In January, Thai police arrested a Lebanese-Swedish national with alleged links to Hezbollah, Iran's Lebanese affiliate, who led them to a cache of explosive material. Days prior to the arrest, Israel and the U.S. had both advised travelers to be wary of attacks on areas frequented by foreigners.
State Dept. spokeswoman did not explicitly link Iran to the latest incident in Thailand, but did note the sequence of events. "With regard to this bombing, the incidents in Delhi, incidents in Georgia, while we will await the results of the investigations, these events do come on the heels of other disrupted attacks targeted at Israel and Western interests, including an Iranian-sponsored attack in Baku, Azerbaijan, and a Hezbollah-linked attack in Bangkok, Thailand, before this. "
"The point is that this is not an accident," said Nuland. "We seem to have an uptick in this kind of violence. We're concerned about it. Some of these have been linked to Iran. With regard to these recent ones, we're going to await the results of the investigation, but we are looking at the links."
Luis Martinez contributed to this report.