Update (12:14 p.m. EST): Israel starts its saber rattling: Public Security Minister Yitzhak Aharonovitch didn't mention Iran by name in his comments on state radio Tuesday, but he threatened revenge for the Bangkok attack, according to CBS: "We know who carried out the terror attacks, we know who sent them, and Israel will settle the score with them."
Update (9:27 a.m. EST): Israeli defense minister Ehud Barak accused Iran of being behind the bombing, saying the incident "proves once again that Iran and its proxies continue to perpetrate terror," according to the Associated Press.
Update (8:28 a.m. EST): The Associated Press has a few more details about the incident, confirming via the Thai authorities that the man was an Iranian named Saeid Moradi, and that a second Iranian man has been arrested at the Bangkok airport apparently on his way to Malaysia -- though the second man's involvement in the blasts hasn't been confirmed. The latest report says a cache of explosives went off in Moradi's house, after which he and two other foreigners tried to escape. When a taxi wouldn't pick up the blood-soaked Moradi, "He then threw an explosive at the taxi and began running," the AP reports. When police came, he tried to throw a grenade at them, but it reportedly bounced back and blew off his legs.