Acting on a tip, D.C. police have arrested three New York city residents on drug charges and seized more than four pounds of cocaine valued at over $1 million from a Northwest hotel, according to police and an affidavit filed in D.C. Superior Court.

According to the affidavit filed in support of a search warrant, the investigation that led to Wednesday's arrests was begun after a woman phoned the police Morals Division June 1, identified herself as a prostitute and said she had just been with a man in a hotel room where she saw what she thought was cocaine.

She told police that she had also been with the man a few weeks earlier at the same hotel -- the General Scott Inn at 1464 Rhode Island Ave. NW -- and that she had seen what was apparently cocaine then, as well, the affidavit said.

It stated that police went to the hotel the day after the man checked out and found a white powder on a table and dresser top and a broken pipe used to smoke cocaine.

Police learned from hotel management that the man had stayed there often over the previous three months, the affidavit says. It says that the man was apparently "transporting cocaine from the southern Florida area north to the Washington, D.C., and New York City area utilizing the Amtrak train system."

According to the affidavit, the hotel management called police Wednesday and said the man had checked into the hotel again, and police executed a search warrant on two rooms in which they seized 4 pounds and 10 ounces of cocaine and $475 in cash.

They said the suspects, Carlos Rivera, 42, Adelaida Meneses, 43, and Patricia Rodriguez, 22, all of New York, were each charged with possession of cocaine with intent to distribute.