BERLIN TOWNSHIP, Mich. (AP) — Investigators need more time to collect information before charges can be filed in the deaths of two young siblings who were killed by a suspected drunken driver at a child’s weekend birthday party, a Michigan prosecutor said Monday.

“We expect to make a charging decision” on Tuesday, Monroe County prosecutor Jeff Yorkey said in a brief statement.

“We appreciate the public’s patience and know that you understand how important it is to have all of the information in front of us before making such an important decision,” Yorkey said.

A 66-year-old woman drove into the Swan Creek Boat Club in Berlin Township, killing 8-year-old Alanah Phillips and her 5-year-old brother, Zayn Phillips, at a birthday party attended Saturday by children and adults, about 30 miles (48 kilometers) south of Detroit, authorities said.