Thailand rocked by eleven bombs in one day

Five provinces in Thailand have been hit by eleven bombings in less than a day, authorities say.

At least four people have been killed and about 34 injured.

No one has claimed responsibility for the blasts -- and it's not clear if the bombings are connected.

Thai police say there's no evidence the attacks are related to international terrorism.

"These incidents are different from the usual terrorism acts, they are more local sabotage on certain locations and provinces," Deputy Police Spokesman Maj. Gen. Piyapan Pingmuang said at a news conference Friday.

The series of blasts come days before the one year anniversary of the Erawan Shrine bombing, which killed 20 people, and five days after the country voted on a new constitution.

Pingmuang said the blasts are not linked to the Erawan bombing.