The FBI is investigating allegations of corruption against the government of Puerto Rico in how it dealt with handing out government contracts.

Here's what we know

This week, several new developments have emerged in the potential corruption scandal.

On Monday, Puerto Rico's governor Ricardo Rosselló (D) asked his Treasury Secretary Raúl Maldonado to resign. Maldonado had gone on a local radio station and talked about the existence of what he called an "institutional mafia" in the Puerto Rican government. He claimed to have been offered bribes on multiple occasions.

Rosselló claimed that he had lost faith in Maldonado, but denied that the call for his resignation was directly related to the comments Moldonado had made on the radio.

Maldonado's son responded by calling Rosselló "corrupt" on social media.

On Tuesday, Puerto Rico Chief of Staff Ricardo Llerandi accepted the resignation of the man in charge of Puerto Rico's Health Insurance Administration. According to ABC News, Llerandi appeared before a federal grand jury shortly before this to testify regarding a consultant for a company that oversaw the Health Insurance Administration.

On Thursday, Dougless Leff, the FBI special agent in charge of the bureau's San Juan Field Office, told Radio Isla that the FBI was conducting a probe into accusations of favoritism and corruption related to government contracts. He said it that it was possible that this would lead to some arrests. Leff has led the San Juan Field Office since he was appointed to the post by former-FBI Director James Comey in December 2015.

While Leff did not not give specifics, he did indicate that the probe would be widespread. "It's fair to say that this is going to be a very busy summer for us," he said, according to Bloomberg News.