By Milt Sosin

Miami police today sought a motive and two possible suspects in the bombing of the Dominican Republic's Consulate at 1038 Brickell Ave.

No one was injured in the blast, which blew out windows at the consulate and the Arrowhead Motel next door and caused damage to a ground floor reception room and the entrance to the consulate.

On the second floor of the consulate at the time of the explosion were Consul Aguilino Ricardo, 56; his wife, Argentina, and their two grandchildren, Howard and Patrick Koffler, 12 and 9, respectively.

Rita Ricardo Koffler, mother of the boys, had left her sons at the consulate while she went on a family visit. When she returned, she found the consulate in an uproar and was fearful for the safety of her sons until her mother tearfully reassured her.

"I knew something like this was going to happen," Mrs. Koffler said, "I just knew it."

Two men were seen leaving the vicinity a short time before the blast rocked the neighborhood, investigators said.

The area is one of residences and office buildings. A car parked in front of the consulate was badly damaged.

Being sought in conjunction with the bombing was a yellow or orange Volkswagen in which the two men may have left the area.

The consulate reportedly has received threats in recent days. Investigators speculated that the bombing may have been in retaliation for the arrest by Dominican authorities last week of 33-year-old Humberto Lopez Jr., on a charge of illegal entry.

Lopez, a Cuban-born exile, was deported to Miami and is being held without bond pending arraignment on a bail jumping charge and sentencing on federal and state convictions for firearms violations.