Calgary police closed Deerfoot Trail in both directions at 17 Avenue S.E. because of a multi-vehicle crash. (Supplied)

Calgary police say a traffic incident near 17 Avenue S.E. has closed the city's busiest highway in both directions Sunday afternoon.

Officials made the announcement on social media at 4:15 p.m.

Please be advised Deerfoot Trail at 17 Ave S.E. is closed both northbound and southbound due to a traffic incident. Please avoid the area and find alternate routes.

— Calgary Police (@CalgaryPolice) September 6, 2020

According to the city's traffic cameras, the closure is due to a multi-vehicle incident that blocked two lanes on the highway.

UPDATE: Multi-vehicle incident, SB Deerfoot Tr and 17 Ave SE, road is closed NB and SB. #yyctraffic #yycroads

— YYC Transportation (@yyctransport) September 6, 2020

CTV News has learned the incident involved a pedestrian who was struck by a vehicle. The patient was taken to hospital in serious but non-life threatening condition.

Traffic is being detoured past the incident, but police are requesting other drivers avoid the area if at all possible.

This is a developing story and more details are expected…