The flight crew did not seek any permission or clearance for landing, nor did they give standard call-outs after 1000 feet. The aircraft's speed was 160 knots, which was more than the prescribed speed, and the pilot should not have descended below 500 feet (Minimum Descent Altitude) unless he had sighted the runway. The cockpit voice recorder conversation between the pilot and the co-pilot showed that both were focused on trying to see the runway and they had decided to attempt such a landing and in their anxiety to see the field, they lost track of their altitude. Instead of the pilot-in-command concentrating on the instruments, both pilots were trying to sight the runway without paying necessary attention to the altimeter.