The TTC will close a stretch of the Yonge subway line this weekend as work continues on a new double crossover section of subway track at King Station.

The closures will affect subway service between Union and Bloor stations Saturday and Sunday with full service scheduled to resume at 6 a.m. Monday.

During the closure, all trains on the University-Spadina line will turn back at Union Station, while trains on the Yonge line will turn back at Bloor-Yonge Station.

Shuttle buses will be running to ferry passengers between Rosedale and Union stations. Buses will stop at Bloor, Wellesley, College, Dundas, Queen, King and Front streets.

One additional closure of the Yonge line will be required on May 26 and 27, the TTC says.