DELPHI, Ind. – Authorities said Monday they are expanding the search for a suspect in the killings of two girls who were found dead near a northern Indiana trail last week.

Indiana State Police are looking beyond the town of Delphi for a man photographed near the trail Feb. 13 around the time a relative dropped the girls off, Sgt. Kim Riley told WLFI-TV in Lafayette (http://bit.ly/2l0oatA ).

Police said Sunday that the unidentified man is the “main suspect” in the deaths of 14-year-old Liberty German and 13-year-old Abigail Williams.

“We are actually expanding out,” Riley said Monday. “We want people who may have seen somebody walking, that may have picked up a hitchhiker, that may have seen a hitchhiker around that afternoon.”

Authorities have not detailed the evidence that led them to consider the man a suspect or how they obtained the grainy photograph. Police had previously said they considered him a person they wanted to speak with as part of the investigation.

The girls’ bodies were found Tuesday, one day after they went missing, about a quarter-mile from an abandoned railroad bridge that’s part of a trail system. The teens had planned to go hiking on the trails during a day off school in Delphi, a community of about 3,000 people some 60 miles northwest of Indianapolis.

Their deaths have been ruled a double-homicide, but authorities have not disclosed how the girls died. Private funeral services were held Sunday.

A task force made up of FBI agents, state police and local law enforcement is investigating.

___

Information from: WLFI-TV, http://www.wlfi.com/