The Lorain County sheriff confirmed to the FOX 8 I-Team that detectives are investigating harassing phone calls and threatening messages aimed at police.

Officials have announced that the memorial service for Lorain Police Department Officer Phillip C. Wagner, who was killed during an ambush, will take place July 30 at Rocket Arena in Cleveland.

Law enforcement officers from across the state will patrol the streets of Lorain this week, allowing the city’s police department to attend the Wednesday funeral of Officer Phillip Wagner, who died in an ambush last week.

Data analyzed by the CBS News Crime Unit shows at least 50 law enforcement officers have been shot in ambush attacks so far this year.

Wagner died Thursday after being shot in an ambush attack. Two other officers were wounded, with one suffering serious injuries.

Volunteers met at the Kurtz Bros, Inc. in Avon on Sunday to create luminary bags for the memorial in front of the Lorain Police Department set up to honor fallen Officer Phil Wagner.