Police find unexploded bombs following coordinated blasts

The attacks were carried out by a group on the orders of one individual, authorities said

Thai police over the weekend found and defused five explosive devices that had failed to detonate when an as yet unidentified group carried out a series of deadly bomb attacks on popular tourist spots late last week.

Police said they had arrested one suspect following the bomb and arson attacks on Thursday and Friday that killed four people and wounded dozens more in some of Thailand's best-known southern resorts and islands.