(Adds initial toll, details)

BEIRUT, July 27 (Reuters) - Two bomb blasts hit the northeastern Syrian city of Qamishli near the Turkish border on Wednesday, killing or wounding dozens of people, a monitoring group and state television reported.

The British-based Syrian Observatory for Human Rights said at least one of the explosions hit near a security headquarters of the Kurdish administration that controls most of Hasaka province, where Qamishli is located.

Dozens of people were either killed or wounded in the blasts, the group said.

State TV said one blast was from a car bomb and the other from a bomb on a motorbike. It said at least one person had been killed and dozens wounded.

There was no immediate claim of responsibility for the explosions.

Islamic State, which is fighting against the Kurdish YPG militia and its allies in Hasaka and Aleppo provinces, has targeted Qamishli and the provincial capital, Hasaka city ,in the past with bombing attacks.

(Reporting by John Davison, editing by Larry King) ((John.Davison@thomsonreuters.com;))