DES MOINES, Iowa — A spokeswoman for a company that collects trash in a northeast Iowa city where two young cousins disappeared says trash from the city is being separated from other collections so investigators can check it.

Debbie Acklin of Black Hawk County Waste Disposal says authorities asked the company Monday to start dumping trash from Evansdale homes and businesses in a separate area of the county landfill.

Eight-year-old Elizabeth Collins and 10-year-old Lyric Cook-Morrissey were last seen Friday at their grandmother’s house in Evansdale. Their bicycles and Elizabeth’s purse were found at nearby Meyers Lake, and FBI dogs detected the girls’ scent in the area.

An FBI spokeswoman says an agency dive team from Los Angeles may also be called in to help search the lake.