Police want to see witness or dash-cam footage of a grey 2013 BMW sedan driving in Civic following a fatal collision last week.

At about 9.20pm, on March 11, a 70-year-old cyclist died at the scene of a collision between a car and cyclist in the southbound lanes of Northbourne Avenue near Murdoch Street.

Police want any footage of the BMW being driven from Gungahlin to Civic between 7pm and 7.30pm, or from Civic to Lyneham between 9pm and 9.20pm.

Call 1800 333000, or via the Crime Stoppers ACT website.