More Blasts Hit London Transportation

There were more explosions in London subways and buses today, but so far they appear to be minor with no reported deaths:

Up to four explosions hit London's transport system on Thursday, exactly two weeks after more than 50 people were killed in blasts on underground railway trains and a bus.

No one was reported injured in the blasts that caused major disruption and shook the nerves of an already jittery city.

Witnesses said they had seen what could have been a would-be bomber running away after dropping a rucksack on one of the trains.

"We all got off on the platform and the guy just ran and started running up the escalator," one witness who gave her name as Andrea told the BBC.

"Everyone was screaming for someone to stop him. He ran past me ... and he ran out of the station. In fact he left a bag on the train," she said.

A blast blew out the windows of a bus in Hackney in east London, but there were no reported injuries.

A police officer told Reuters: "The bus driver heard a bang at the back of the bus. He thought it was probably a vehicle that had hit him.

"He stopped at a nearby bus stop and saw a suspect package at the back of the bus.

Bomb attacks on three underground trains and a bus in London killed 56 people, including the four bombers, on July 7.

Armed police entered a hospital near one of the incidents at Warren Street in central London and immediately cordoned off the building.

"Three armed policemen just ran into the major incident are entrance of University College Hospital," a Reuters correspondent said.

The Fire Brigade said Warren Street underground station was evacuated after reports smoke was seen coming out of a train.

A television reporter at Oval underground station said police had cordoned off the area and brought in sniffer dogs.

London transport officials said four underground lines had been suspended.