Published Saturday, 13 August 2011
No-one was injured in the blast which happened at Free Derry Corner shortly before 7pm.
Meanwhile petrol bombs continued to be lobbed at police in the Butcher Gate area of the city.
The disturbances broke out towards the end of the Apprentice Boys' parade, during which 10,000 marchers walked through the city to mark the anniversary of the 1688/89 siege.
Masked youths attacked police landrovers, throwing petrol bombs and a number of cars have also been hijacked and set alight.
A woman and her daughter were pulled from their car in the Creggan Street area at around 6pm, as the vehicle was targeted by hijackers.
Earlier a Royal Mail van was hijacked at Madams Bank Road and torched in Earhart Park by two men shortly after 12pm.
Motorists in the area were warned to remain vigilant as a car was set alight in Fahan Street at around 5.15pm and a van was hijacked on the Leckey Road.
Police also came under attack when petrol bombs were thrown at the Memorial Hall and at landrovers. Missiles were also thrown at officers in the Butcher Gate area at around 4pm.
Earlier, a minor scuffle broke out between protesters and police at Shipquay Street.
Local SDLP MLA Mark H Durkan said the scenes in the city were "disgraceful".
"I do believe we have a serious situation here, there's quite a large number of youths gathered in the Bogside. We had a couple of vans set alight. There's also a car in flames.
"I just hope the police have a good handling on the situation."
Two arrests were made during the day for disorderly and riotous behaviour and a 16-year-old boy was arrested for disorderly behaviour at premises on the Dungiven Road and taken to Strand Road police station.
UTV's Gareth Wilkinson described some of the scenes.
"Many petrol bombs were thrown at a number of landrovers sent in to clear hijacked cars which had been set alight in the area.
"Youths with masks attacked the landrovers with missiles and petrol bombs.
"It was a short, sustained and serious piece of rioting which ended quite quickly."
Police remained on high alert across the city throughout the night.