Two suspected gang members have been arrested in the killing of a 16-year-old who was gunned down after leaving a birthday party, Prince George's County police said.

Akil Darnell Ings, 17, and Kquantae Markies Fisher, 19, were arrested Thursday and charged with first- and second-degree murder in the death of Marcus Antonio Jones over the weekend.

Police are looking for a third perpetrator, whom they have not identified.

Detectives said the shooting was gang-related. Ings and Fisher belonged to gang known as Baby Haiti, and Jones belonged to the Danger Boys, and all three teenagers attended a birthday party in Fort Washington on Saturday night.

As tensions escalated at the birthday bash on the 7700 block of Webster Lane, additional gang members were called in as reinforcements, police said.

Shortly after midnight Sunday, Jones was standing with members of his group when they were approached by Ings, Fisher and a third person.

Police said Ings pulled out a gun and shot Jones in the leg. Emergency crews transported him to a hospital where he died.

Police said they do not know whether Jones was the intended target.

A gun was recovered at the scene and police are conducting ballistics tests on the weapon.

The killing shocked students and teachers at Friendly High School, where Jones was a sophomore.

The raw emotions at the Fort Washington campus of Friendly, police said, caused a series of fights Tuesday that resulted in the arrest of five young men, including an adult who did not attend the school

Ings, of Suitland, and Fisher, of Fort Washington, attend Crossland High School in Camp Springs, police said Thursday.

Fisher was being held without bond, and Ings was in custody in the District, awaiting extradition to Prince George's County.

Jones was the fourth Prince George's County Public Schools student to be killed since August. All of the slayings occurred off school grounds. Amber Stanley, 17, was killed at her Kettering home in August; Marckel Ross, 18, was shot to death while wearing his school uniform and walking to Central High School in September; and Eliezer Reyes, 14, was killed last month in a gang-related shooting in Lewisdale.