Customers walk past empty racks as toilet paper and tissue are sold out at a supermarket in Hong Kong, Feb 5, 2020.  (PAUL YEUNG / BLOOMBERG)

Hong Kong has been struggling with a shortage of face masks to protect against the coronavirus outbreak. Now it could be facing a run on toilet paper.

Toilet rolls were unavailable in supermarkets in parts of the city as posts circulated on social media show empty shelves and shoppers lining up to snag rolls.

The Hong Kong government said that steps to contain the coronavirus would not affect the movement of freight across the border

ALSO READ: Coronavirus: HK braces for possible community outbreak

The cause of the toilet paper shortage wasn’t immediately clear, but speculation was rife on social media about possible holdups involving the supply chain on the Chinese mainland. 

The city’s government said late Wednesday that it regretted the “malicious act of spreading rumours” caused shortages of products like rice and toilet paper. It added that steps to contain the coronavirus would not affect the movement of freight across the border.

READ MORE: City chief remains optimistic about controlling coronavirus

Vinda International Holdings, a Hong Kong-listed toilet paper producer, didn’t immediately respond to a request for comment on Thursday, nor did some of Hong Kong’s supermarket chains. Vinda shares rose as much as 8 percent to a record high in the morning session.

One young man carrying a sack of toilet paper rolls on the street on Wednesday evening said a friend had lined up to get them. Others didn’t have friends to help. Visits to eight supermarkets near the main business district by a Bloomberg reporter turned up no rolls. Two men stood outside a U Select supermarket in the Sheung Wan neighborhood, trying to figure out how to plan their lives around having no toilet paper.

“We went to five stores and no toilet paper,” said Lok Gork, 30, a designer living in Hong Kong. “We got some wet wipes. You never know. You’re better safe than sorry.”

ALSO READ: HK is our shared home — and so is the whole country