11.   Media reports said the blast appeared to be accidental but authorities were not completely sure.

12.   One blast appeared to have been in the area of the presidential palace, but it was impossible to determine the precise location because of the nighttime curfew.

13.   Reports said the blast appeared to be an accident.

14.   State security officers at the scene told reporters the blast appeared to be from an explosive device.

15.   State security officers told reporters that the blast appeared to be caused by an explosive device.

16.   The blast appeared to have caused little damage to other cars in the parking lot.

17.   The blast appeared to be accidental, officials told French radio.

18.   The blast appeared to be accidental.

19.   The blast appeared to have been caused by explosives hidden in a parked van, said Dharmendra Kumar, deputy police commissioner in South Delhi.

20.   The deputy prime minister who is heading the investigation said Monday that the blast appeared to have been caused by safety violations.