PICTURED: Fourth Baltimore bridge builder whose body was pulled from van on the bottom of the river after he plunged to his death when ship struck - as his heartbroken mom says: 'I wish I'd told him I love him one last time'

The distraught mother of a Mexican construction worker who died after a 948-foot-long cargo ship crashed into a Baltimore bridge he was working on has said she is devastated she didn’t tell him how much she loved him the last time they spoke.

Father-of-four Alejandro Hernandez Fuentes, 36, originally from Mexico, was one of six workers who plunged to their deaths in the early hours of Tuesday morning after the DALI shipping container crashed into the iconic Francis Scott Key Bridge, causing it to collapse immediately.

His body, alongside that of Dorlian Ronial Castillo Cabrera, 26, was found by divers on Wednesday afternoon, inside of a red pickup truck that had sunk 25 feet into the frigid Patapsco River.

Alejandro’s mother, Obdulia Fuentes, this morning tearfully revealed to DailyMail.com that her son had followed to her to the US from Mexico in 2006 because ‘he couldn’t bear to be without his mother’.

Speaking in Spanish, while Alejandro’s niece translated, Obdulia said he had ‘always been a great son’. 

Father-of-four Alejandro Hernandez Fuentes, 36, originally from Mexico , was one of six workers who plunged to their deaths in the early hours of Tuesday morning

His body, alongside that of Dorlian Ronial Castillo Cabrera (pictured), 26, was found by divers on Wednesday afternoon, inside of a red pickup truck that had sunk 25 feet into

The devastation at the site of the collapse, which happened when the powerless cargo ship rammed it early Tuesday, is extensive

Astonishing footage shows the moment the vessel plowed into the Francis Scott Key Bridge in Baltimore, sending the colossal steel structure crashing into the Patapsco River

‘I can’t find the words to express the pain I feel in my heart,’ she added.

She said Alejandro, who was living in Baltimore, left behind two sons and two daughters, aged between two and 14.

‘From a very young age he always worried about me,' she said, speaking from her home in Riverdale, Maryland.

‘He always tried his best to help. He started working really hard to buy me a washing machine because he didn’t like the fact I was washing clothes by hand.'

Obdulia said she last spoke to her son last Thursday, around two hours before he went to work.

She said she ‘couldn’t remember’ exactly what they said to each other, only that ‘I couldn’t tell him that I loved him a lot’.

‘I didn’t know it was going to be my last conversation with him. I regret not telling him that I love him,' she added. ‘He lives far away from here so I don’t have the opportunity to see him every day to hug him.’

Rescue personnel gather on the shore of the Patapsco River

The ship - the Singaporean-flagged Dali - was 20 minutes into its journey when it slammed into a support column on the bridge

Obdulia said Alejandro started working in landscaping when he first moved to the US and had been working in construction in Baltimore for around ten years.

On Wednesday, Baltimore Mayor Brandon Scott confirmed that divers recovered two victims trapped within a sunken vehicle.

Massive barges carrying cranes streamed toward Baltimore on Thursday to begin the challenging work of removing twisted metal and concrete in an attempt to open a key shipping route blocked by the wreckage.

The devastation at the site of the collapse, which happened when the powerless cargo ship rammed it early Tuesday, is extensive.

Officials said they would need to start clearing away the twisted wreckage before anyone could reach the bodies of four other missing workers. Divers are to resume searching once the debris is cleared. 

Miguel Luna is one of the workers feared dead. Officials said they would need to start clearing away the wreckage before anyone could reach the bodies of four other missing workers

National Transportation Safety Board officials boarded the ship, the Dali, to recover information from its electronics and paperwork and to interview the captain and other crew members. Investigators shared a preliminary timeline of events before the crash, which federal and state officials have said appeared to be an accident. 

Of the 21 crew members on the ship, 20 are from India, Randhir Jaiswal, the nation’s foreign ministry spokesperson, told reporters Thursday. One was slightly injured and needed stitches, but 'all are in good shape and good health,' Jaiswal said.

The victims, who were part of a construction crew fixing potholes on the bridge, were from Mexico, Guatemala, Honduras and El Salvador.

The crash caused the bridge to break and fall into the water within seconds. Authorities had just enough time to stop vehicle traffic, but didn’t get a chance to alert the construction crew.

The sudden loss of a highway that carries 30,000 vehicles a day and the port disruption will affect not only thousands of dockworkers and commuters but also U.S. consumers, who are likely to feel the impact of shipping delays.