LL Cool J is pulling out of a Fourth of July concert in Philadelphia in solidarity with city workers unionized with District Council 33, who went on strike on Tuesday after the AFSCME union failed to reach a deal with the city.

AFSCME District Council 33, which represents more than 9,000 city workers, went on strike at midnight June 30, impacting city services including trash and recycling collections, street and water repairs and maintenance, libraries and public pools, airport custodial services, licenses and inspections and public health services.

PHILADELPHIA (AP) — Nearly 10,000 city workers in Philadelphia who collect trash, answer 911 calls, maintain city pools and perform other jobs went on strike Tuesday after contract negotiations broke down. District Council 33 President Greg Boulware said the city hadn’t agreed to a high enough wage increase, WPVI-TV reported.