MILWAUKEE (AP) — Wisconsin police departments are withdrawing from agreements to send personnel to help bolster security at the Democratic National Convention in Milwaukee next month.

Police departments in Fond du Lac, Franklin and West Allis have backed out, with some of them citing Milwaukee’s new orders against the police use of tear gas and pepper spray at demonstrations, the Milwaukee Journal Sentinel reported Tuesday. The departure of those departments casts doubts on the program that’s designed to bring about 1,000 officers from outside agencies to provide security at the convention, which is scheduled to take place Aug. 17-Aug. 20.

The convention, which will be held at the Wisconsin Center in downtown Milwaukee, has been scaled down to a mostly virtual event, with only about 300 people expected to attend in-person. Most of the speeches will be delivered online from other locations, though former Vice President Joe Biden has said he will be in Milwaukee to accept the nomination. Despite the event’s smaller scale, police are preparing for potentially large protests in and around the venue.

Fond du Lac Police Chief William Lamb told the Journal Sentinel that the agreements were collapsing, saying he expects other agencies in the state to also withdraw. Lamb chairs the Wisconsin Police Executive Group, which is made up of police chiefs from cities with populations of more than 20,000 people.

The withdrawals come as Milwaukee’s Fire and Police Commission issued a directive last week to the city’s police chief, Alfonso Morales, to change department policy to discontinue the use of tear gas and pepper spray.