A man was shot in Columbia Heights early Sunday morning following an argument in an IHOP restaurant, D.C. police said.

At about 6:30 a.m., two men and a woman got into an argument at the restaurant, which is located at 14th and Irving streets NW and is open 24 hours a day. Police said one of the men was shot during the argument, and he was taken to the hospital and is in critical condition.

Police are now searching for the two others. One is described as a black male with dreadlocks, about 6 feet 1 inches tall and 165 pounds, and who was wearing green pants at the time of the shooting. The other is described as a black woman with a light complexion and heavy build.

A police spokesman said Sunday afternoon that he did not know if the shooting occurred inside or outside of the restaurant. The IHOP opened in November 2010 and is in the same complex as Target, Best Buy and a number of other chains that moved into quickly gentrifying Columbia Heights.

As of lunchtime Sunday, the IHOP was open for business.