MTR passengers said they were surprised to see services on the Tsuen Wan Line had returned to normal on Monday morning, after engineers worked through the night following a train accident on Sunday at Yau Ma Tei Station.

Several doors of a train came off in the incident at around 9.30am on Sunday and services between Jordan and Lai King were suspended for the rest of the day.

Trains started running normally again from 5.50am on Monday.

A passenger surnamed Lau said she didn't expect services to be back up and running again so soon.

"I had planned to go to Tsim Sha Tsui by bus. The MTR Corporation said trains would be operating normally today, but I didn't expect it to be that early. I'm happy they fixed the problems before the first train departed. I have to thank the engineers," she said.

Another passenger, surnamed Ho, said he woke up half an hour early as he thought he might have to get to North Point by bus.

Meanwhile, some passengers also expressed worries over train safety, saying they would avoid standing near train doors after Sunday's accident.

However, a man surnamed Chow said he wasn't concerned.

"This is just an accident. During peak hours, it's unavoidable to stand near the train doors. I am not worried," he said.