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U.S. forces near Baghdad found a weapons cache of around 20 medium-range missiles equipped with potent chemical weapons, the U.S. news station National Public Radio reported on Monday.
NPR, which attributed the report to a top official with the 1st Marine Division, said the rockets, BM-21 missiles, were equipped with sarin and mustard gas and were "ready to fire." It quoted the source as saying new U.S. intelligence data showed the chemicals were "not just trace elements."



It said the cache was discovered by Marines with the 101st Airborne Division, which was following up behind the Army after it seized Baghdad's international airport.

U.S. Central Command headquarters in Qatar had no immediate comment.

The United States and Britain launched the war against Iraq to rid the country of weapons of mass destruction. Iraq denies having such weapons.

BM-21s are roughly equivalent to our MLRS system. According to this source, the missiles have a range of about 20 kilometers or so.

The BM-21 fires a "9-ft rocket" with a range of 20,380 meters. Each launch tube is grooved to impart a slow rotary motion to the rocket. However, the rocket is primarily fin-stabilized. This combination of spin- and fin-stabilization ensures closely grouped fire at ranges of up to 16 kilometers. The BM-21 and other 122mm rocket launchers can fire all 122mm rockets designed to fit in Soviet-derived 122mm launchers (including those that can achieve ranges of 30,000 to 36,000 meters). The 122-mm fin-stabilized rockets can deliver Frag-HE, chemical, or incendiary warheads to a range of over 20 kilometers, or the newer HE and cargo rockets out to 30 kilometers. On explosion, the warhead produces a great fragmentation effect and shock wave.

Because of its high volume of fire and large area coverage, the BM-21 is well suited for use against troops in the open, for use in artillery preparations, and for delivery of chemical concentrations. One volley from a BM-21 battalion is 720 rounds. Because these weapons have a large circular area probable (CEP), they are not suited for attacks against point targets.