NATO said today it had attacked an oil refinery near the Yugoslav capital Belgrade and targets at Novi Sad in overnight air raids. Serbian television showed fires raging at the refinery in Pancevo on the east bank of the Danube across from Belgrade. It’s been targeted several times since NATO began bombing Yugoslavia almost three weeks ago. Yugoslav media have reported that a missile hit a residential area in the northern city of Novi Sad yesterday. The NATO officials said a surface-to-air SAM missile facility was operating in the region. And the official Yugoslav news agency, Tanjug, said there were two raids on military barracks in Pristina, the Kosovo capital, earlier today and that NATO planes had been flying overhead all morning. As usual, it gave no details of casualties or damage.