NEW YORK/MONTREAL/WASHINGTON March 23 (Reuters) - An Air Canada Express (AC.TO), opens new tab jet collided with a fire truck while landing at New York's LaGuardia airport late on Sunday, killing both pilots, injuring dozens and closing the facility, authorities said. The Air Canada Express CRJ-900 plane, operated by its regional partner Jazz Aviation, was carrying 72 passengers and four crew members and had departed from Montreal, said Jazz, which is owned by Chorus Aviation (CHR.TO), opens new tab. Jazz and the Port Authority of New York and New Jersey confirmed that the pilot and first officer were killed.