FBI agents raided San Juan’s municipal building on Tuesday amid an investigation into purchasing practices used by city officials, including Mayor Carmen Yulín Cruz.

Video posted on Twitter shows several uniformed FBI agents proceeding into the building Tuesday morning. Local journalist Luis Guardiola noted in a tweet that dozens of FBI agents were involved in the raid.

Decenas de agentes del FBI ocupan el 15to piso de la Torre Municipal. Asi llegaron esta mañana los federales. pic.twitter.com/z3h1CObwLp — Luis Guardiola (@GuardiolaTwitt) October 16, 2018

A spokesman for the agency told news service elnuevodia.com that Tuesday’s raid was related to an ongoing investigation into whether the mayor’s office and other city officials had shown favoritism when the city agreed to a contract with the company BR Solutions for $4.7 million over two years. READ MORE: