U.S. Customs officials at Dulles International Airport arrested two airline passengers yesterday after seizing more than 11 pounds of cocaine with a street value estimated by officials at several million dollars.

The suspects, who were taken into custody after 9 a.m. after arriving on a Braniff flight from Bolivia, were identified as Angel Rodriguez, 52, of Levittown, N.Y., and Agustin Versastequi, 41, a Peruvian who lives in Hoboken, N.J.

Drug Enforcement Administration officials said the seizure was believed to be one of the largest ever made in the Washington area. It comes less than a month after federal narcotics agents arrested two men in Arlington and charged them with trying to sell more than $2 million worth of cocaine.

According to Customs spokeswoman Lois M. Bourquin, Rodriguez was seized after a customs inspector noticed a false bottom in a suitcase and discovered 4 1/2 pounds of cocaine. She said Verastequi was arrested with more than seven pounds of the drug strapped around his waist after a search dog indicated the presence of more drugs on the airplane.

David G. Canaday, special agent in charge of DEA's Washington office, said the two men will be arraigned Saturday before a U.S. magistrate in Alexandria.