Iran denied a "cover-up" Monday after taking days to reveal an airliner was accidentally shot down last week, a disaster that sparked demonstrations and calls for a fully transparent investigation.

The
Ukraine International Airlines
Boeing 737 was shot down by a
missile shortly after taking off from Tehran before dawn on Wednesday, killing all 176 passengers and crew on board.
The Kiev-bound airliner was knocked out of the sky hours after Tehran had launched a wave of missiles at Iraqi bases where US troops are stationed in retaliation for the killing of a top Iranian general.