Money is slowly trickling into a Michigan police station after a man accidentally spilled $30,000 onto a highway. A cardboard box full of cash fell from the back of the man’s truck onto US 31 in Grand Haven on Thursday, the city’s Department of Public Safety said. Police said officers and bystanders eventually recovered $2,470 from the scene and asked anyone who had picked up other bills to take the cash to the Grand Haven Department of Public Safety.

“All money has been removed and treasure hunters are directed to not stop or walk in traffic lanes or any area that would pose a risk,” Thursday’s statement warned. On Saturday, the department posted an update, praising a number of people who had brought in cash. It said one woman returned $3,880 and two 17-year-olds had handed in $630.