The British and United States governments are warning their citizens about possible threats against Westerners in China’s capital city.

The Beijing embassies of those two counties issued nearly identical advisories on Thursday, saying they received word that Westerners could be targeted in the city’s Sanlitun district “on or around Christmas Day.” The governments urged their citizens to be vigilant.

Sanlitun is a busy shopping and entertainment district.

Beijing police issued a yellow security alert, according to a post on one of its social media pages. The post says that more people will visit hotels, restaurants, malls and entertainment venues during the holiday season, and police will ensure that people remain secure.

China’s official Xinhua news agency reported that a yellow security alert is the second-lowest warning level on a four-tier system.

Neither the British nor the United States government mentioned the nature of the threat, though other countries issued similar warnings.

Global Affairs Canada, while not specifically mentioning Beijing or issuing any kind of nationwide travel advisory, said its citizens “should exercise a high degree of caution due to the occurrence of isolated acts of violence, including bombings and protests” in China.

Australia’s Department of Foreign Affairs and Trade told its citizens about the United States government’s warning and said “possible road closures and checks” could impact travel in Sanlitun. The French embassy also shared the United States’ information with its citizens.