For the second time this week, Seattle police are investigating a series of robberies at Green Lake.

According to SPD, five people were robbed along the park path around midnight last night by a group of men armed with a handgun and wearing bandannas over their faces.

According to police sources, SPD's K-9 unit tracked the men for two blocks before losing their trail. SPD subsequently called out the Guardian One helicopter, but were unable to locate the men.