HEAVY FIGHTING raged in Kabul, Afghanistan, Saturday as forces loyal to the president battled fighters loyal to a former communist general. The two main hospitals in the city reported 250 injured and eight dead. . . . LONG ISLAND police arrested a 68-year-old Queens, N.Y., woman Saturday and charged her with trying to kill her 87-year-old mother by simultaneously smothering and stabbing her. . . . A MINOR earthquake struck the San Francisco Bay area on Saturday night. No damage or injuries were immediately reported.