HANGZHOU - All flights were suspended at an airport in East China's Zhejiang Province on Monday because of a crack in the runway, sources with the airport said.

The Hangzhou Xiaoshan International Airport halted all inbound and outbound flights after a crack was found on the sole runway during a routine weekly check, a spokesman with the airport said.

The spokesman would not say how large the crack was, but he described it as "minor."

Maintenance workers have been dispatched to work on the runway and flights are expected to resume at noon, he said.

The airport deals with more than 300 flights daily with annual passenger arrivals and departures at about 17 million.

The spokesman said the cause of the crack was not yet known, but technicians said it might be related to prolonged low temperatures this winter.