Thai authorities say an Iranian man carrying a bomb blew off his own legs and wounded four other people in three successive blasts Tuesday in Bangkok.

Government officials say the first blast went off at a house rented by the man in the central part of the Thai capital. It was shortly followed by the man throwing a bomb at a taxi that refused to stop and later trying to hurl a grenade at police on busy road near a school.

The blasts come a day after two bomb attacks targeted Israeli diplomats in India and Georgia. Israel has accused Tehran and its ally Lebanese Islamist group Hezbollah of being behind the attacks. Authorities say it is unclear if the incidents are are linked.

Thai authorities found more explosives in the man's house, but it is unknown what they were intended to be used for. Police say they also found an Iranian passport in the house belonging to the man.

Police say two other foreigners were seen fleeing the house with the suspect. Thai authorities say they later arrested another Iranian man at Bangkok's international airport, but it is unclear if he was involved in Tuesday's incident.

Thai citizens have been on alert since last month, when Thai police acting on a U.S. warning arrested a Lebanese man on suspicion of planning a terrorist attack in tourist areas in Bangkok. The man, who allegedly had links to Hezbollah, led police to a warehouse filled with chemicals that could be used to make a bomb.

Terrorist attacks are rare in Bangkok, which is popular with foreign tourists for its beaches and nightlife.

The United States issued a warning to its citizens in Thailand following Tuesday's incident urging them to maintain a “heightened awareness when in public.”