A man robbed a Whidbey Island bank branch north of Bothell on Friday, with clues leading police to an unsuccessful search in Mountlake Terrace.

Dispatchers received a call around 5:30 p.m. about a bank robbery in progress in the 20600 block of the Bothell-Everett Highway, Snohomish County sheriff’s Lt. Jeff Brand said. The man left with an undisclosed amount of money before police arrived.

Soon, Bothell police received information that the robbery suspect might be driving north on I-405, toward I-5, Brand said. A track brought police to the area of I-5 and 236 Street SW in Mountlake Terrace. Several other agencies assisted with the search until about 7:30 p.m., without finding their man.

The FBI also is investigating.

Authorities described the robber as a white man in his 50s who stands about 5 feet, 6 inches tall. He was wearing a white sweatshirt and black pants during the holdup.

Anyone with information that might help solve the robbery is asked to call the Sheriff’s Office Tip Line: 425-388-3845.