A Police Service of Northern Ireland officer narrowly escaped injury in a pipe bomb attack on his car in east Belfast.
The incident occurred when the officer heard a load explosion while at home early this morning.
A daylight examination by British army bomb experts revealed a sophisticated explosive device had been left under the car.
The PSNI said they are following a number of lines of inquiry but have refused to speculate on who was behind the attack.
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They have asked that anyone who observed suspicious activity near the Upper Newtownards Road area at the time of the attack to contact them.