Four university students were injured as they were caught up in the attack on Westminster Bridge.
They were among a group of 13 students and a lecturer from Edge Hill University, in Ormskirk, who were on the first day of a two-day educational visit to the Houses of Parliament.
The students had just left Parliament and made their way on to Westminster Bridge after they had watched Prime Minister's Questions and met with MPs.
Among those injured were Owen Lambert, 18, from Morecambe, Lancs, who needed stitches to a head wound, and Travis Frain, from Darwen.
Dr John Cater, Vice Chancellor of Edge Hill University, told BBC North West Tonight: "They had just actually finished their session, were leaving the Parliament building and in the Westminster Bridge area where we understand ... they were involved in the incident.
"We understand that two students have been taken to hospital but as walking wounded - one with a head wound and one with a wrist injury. There are two other students who have minor injuries who are with police and acting as witnesses.
"The good news is that the other nine students are now back in a hostel receiving support and will return to the North West tomorrow."
He added: "The details are invariably hazy I guess.Our assumption is that they were either knocked over by other people or struck by the vehicle. Obviously all of them will be somewhat traumatised by what they have seen as well."
Earlier, the university tweeted: "All students and lecturer in Westminster have been accounted for and are being supported by the university."
Patrick Tracey, 64, a retired surveyor from Derby, said he was waiting outside St Thomas' A&E department for news of an injured friend's condition.
Mr Tracey said his friends Andrei and Andrea, a Romanian couple in their mid-20s, were caught up the attack.
Andrei, an engineer, received leg injuries and was taken to King's College Hospital for treatment.
Andrea was taken to St Thomas' although her condition was unknown, Mr Tracey said.
"I was due to meet them at three at the London Eye, that was arranged because they are visiting London from Romania.
"I got to the Eye and I couldn't see them.
"There were people streaming off the bridge and I was hearing helicopters, I was concerned something was going on and it dawned on me, they were at Westminster Abbey and coming to meet me.
"I had a couple of calls from him, his name's Andrei, but I couldn't hear anything apart from the commotion.
Asked how they were hurt, Mr Tracey replied "I imagine it was the vehicle."
He said: "Andrei has some damage to his leg.
"I want to know how Andrea is because he told me he couldn't find his girlfriend. He was in shock.
"They are great young kids."
A message on the Romanian Embassy's Facebook said two citizens had been injured and taken to local hospitals.
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