More bombs explode in Myanmar; police arrest four suspects

YANGON (Reuters) - Several bombs exploded in northeastern Myanmar on Thursday, police said, the latest in a string of unexplained attacks, including a blast this week that injured an American tourist in a plush hotel in the country's commercial capital.

Investigations are proceeding into the motive behind the string of bombings that have killed at least two people and wounded four over five days in four different regions. Myanmar's two biggest cities, Yangon and Mandalay, have both been hit.