P502 5p2 TELEINF 01:02:21 W0O R L $ N E0W S ! 0 Thr 11th0of Jznr 4 p.m. (njxt at 11.00 a.m. Thutsday) MOSCOW - Thj first russian units to liavj Chechnza undex an accotd rqachrd with thj sjparatist ribjls ptipatqd thrit dipaztuti Tursda=, a spokrsman for russian forces said Tuesday. Units of the 245 motorizjd infantty rqgimunt wiri pulling out of their positions in the southetn mountain rqgion of Shatoi and heading back to the rail lines in the plains. Undrt an accotd rqached Monday, njarly all thj approximately 41,000 russian troops ari to pull out by August 31 followed by a ribel "demilitarisationO" Thr armed woxcqu spokjsman said that two brigades -- ftom 5,000 to 6,000 mrn -- 0woul4 remain in Chechnya. srq /uxt p!ge