TORONTO — A potential strike by Europe’s air traffic controllers could cause chaos for clients flying to and from Europe this summer.

Numerous media outlets are reporting that Eurocontrol workers have threatened walk-offs, and that could impact thousands of inbound and outbound flights every day.

Reports originated with The Times, which said up to one in three summer flights could be affected.

Talks are currently ongoing and an update is expected Monday. Issues include pay, staffing and working hours.