According to a copy of a letter uploaded onto Macau legislator Au Kam-san’s official Facebook account, Uber‘s Asia Regional General Manager Mike Brown said the firm planned to exit the small China-ruled city, saying its drivers have been fined a total of 10 million patacas ($1.25 million) in the short time in which it has operated in Macau.

See also: What Didi Chuxing’s Allies Had to Say About Its Merger With Uber China

Uber‘s Macau General Manager Trasy Lou Walsh declined to comment specifically on the letter or to clarify whether the firm would pull out of Macau in September.

“We are committed to continuing to serve the riders and drivers of Macau. We continue to seek opportunities to work with the government on modern ridesharing regulations that will give us the chance to keep serving the people of Macau,” she said in a statement.

Brown couldn’t be reached by Reuters.

There was no immediate response from the Macau government, and legislator Au couldn’t be reached for comment.

See also: Taiwan Wants Uber to Front the Bill in a Sales Tax Stand-Off

Uber has around 2,000 full-time and part-time drivers in the territory, Macau’s news agency TDM reported, saying drivers had been notified of the impending halt in operations.

While Macau isn’t a large market with just 600,000 people, Uber‘s exit would be another blow for the fast-growing U.S. start-up’s ambitions in the region.

In China, following a costly two-year battle to break into the potentially lucrative market, Uber sold its operations earlier this month to bigger local rival Didi Chuxing in a deal that will give Uber a one-fifth stake in Didi.

See also: Massachusetts Plans to Tax Uber, Lyft to Subsidize Taxis

For more on Uber in China, watch Fortune’s video:

Meanwhile Taiwanese authorities have demanded Uber pay a sales tax bill, and may force it out of the island’s market, while it has come under legal scrutiny in Hong Kong.