WASHINGTON -- US Secretary of State John Kerry came out with harsh words for those responsible for the abduction of three Israeli teen boys over the weekend, calling the event a "despicable terrorist act."But the US cannot confirm who is the responsible party, and is still gathering information, the secretary said."The United States strongly condemns the kidnapping of three Israeli teenagers and calls for their immediate release," Kerry said in a statement. "We continue to offer our full support for Israel in its search for the missing teens, and we have encouraged full cooperation between the Israeli and Palestinian security services. We understand that cooperation is ongoing."