WASHINGTON, March 3 (Reuters) - The U.S. military targeted suspected "terrorists" in a strike launched early on Monday in Dobley, Somalia, a senior U.S. military official said.

The official, who declined to be named, told Reuters: "We launched a deliberate strike against a suspected bed-down of known terrorists."

He said it was too early to know what damage had been inflicted, including whether any people were injured or killed in the strike launched overnight Washington time (early morning GMT). The official declined to give details on the type of weapon used.

This was the fourth U.S. air strike on Somalia in 14 months.

Local officials and witnesses in Somalia said they believed two missiles hit a makeshift house in Dobley, a town in a remote area of southern Somalia about 140 miles (220 km) from the port city of Kismayu, in a U.S. air strike against Islamist insurgents. (Reporting by Andrew Gray, Writing by Jackie Frank)