China has cancelled permits for Mount Everest because of the coronavirus, expedition organisers said Thursday, ahead of the spring climbing season on the world’s highest peak.

Last year’s traffic-clogged spring window saw a record 885 people summit Everest, 644 of them from Nepal and 241 from the northern flank in Tibet.

The Nepal side remains open for now although some expedition operators have seen cancellations and climbers have been asked to submit a 14-day travel history and medical reports.