[Last updated Friday at 1:15 p.m. Eastern time. Read more about the suspect, Cesar Sayoc Jr., here.]

A man in Florida was arrested Friday in the wave of mail bombs that have targeted critics of President Trump. The arrest came hours after federal authorities said they had found two more explosive devices: one addressed to Senator Cory Booker, a Democrat from New Jersey, and the other to James R. Clapper Jr., the former director of national intelligence and a commentator on CNN.

Cesar Sayoc Jr., 56, of Aventura, Fla., was taken into custody Friday morning by F.B.I. agents, according to law enforcement officials.

After several packages containing the devices were discovered on Wednesday, law enforcement officials across the country mounted a massive search for the person or persons who had sent them.

On Thursday, three more envelopes were found addressed to former Vice President Joseph R. Biden Jr. and the actor Robert De Niro.