Two Forestville youths were arrested early yesterday morning in connection with the armed robbery of a convenience store. Police closed a section of the Suitland Parkway during their search for the pair.

The youths, aged 15 and 17, were both charged with the armed robbery of a 7-Eleven store at Pennsylvania Avenue and Walters Lane in Forestville. In addition, police said, the 17-year-old, Patrick Pagliocchini, of Springdale Avenue, was charged with assault with intent to murder, having opened fire on police with a high-powered rifle as they moved to arrest him. Police said no shots were returned and no one was injured. Pagliocchini is being held under $25,000 bond at the county detention center in Upper Marlboro.

The other youth is being held at Boy's Village in Cheltenham. His name and address were withheld because of his age.

The search began after the robbers, armed with the rifle and a small-caliber handgun, fled on foot into woods behind the store about 5 a.m., with several police and a trained dog in pursuit. Police said the 15-year-old suspect was apprehended about 30 minutes later, winded and offering no resistance. U.S. park police sealed off Suitland Parkway from Forestville Road to Silver Hill Road for about 40 minutes and searched the area with their helicopter, Eagle 1.

Pagliocchini was treated for dog bites after his arrest, according to jail spokeman James O'Neill.