Miami police intelligence officers arrested a Cuban refugee before dawn Wednesday and confiscated two phosphorous incendiary bombs and packets of "Cuban Power" posters.

It was the fourth arrest in a month associated with the nebulous "Cuban Power" organization that has been blamed for recent bombings and bombing attempts in the Miami area.

Police said the refugee, Omar Bosco-Soto, 24, of 27 NW 47^th St., was arrested while he was sitting in his parked car at 816 SW 12^th Ct.

Sgt. E. W. McCracken said he found two grenade type phosphorous bombs under the seat of the car and assorted "Poder Cubano" leaflets, bumper stickers, and posters elsewhere in the car.

Bosco-Soto, who was reportedly serving three years probation on a 1966 burglary conviction, told police that he was "a public relations man" for Cuban Power, but denied any knowledge of the phosphorous-filled canisters.

He was charged with possession of explosive devices and was being held late Wednesday under $20,000 bond.

Police said the incendiary bombs were the same type used in a recent attempted bombing of the Mexican Consulate in Miami.