The Beijing Municipal Health Commission discovered one new case of COVID-19 on Wednesday that contact tracers had found to be related to infections in Dalian, Liaoning province.

A total of three Beijing cases have been tied to Dalian, which has experienced a new outbreak in recent days. All three people are members of the same family.

Pang Xinghuo, deputy head of the Beijing Center for Disease Control and Prevention, gave details of the new case at a news conference on Thursday.

The patient is an infant 16 months old. The infection was confirmed by a coronavirus test.

The infant's father, who is the son-in-law of the first local case related to Dalian reported on Monday, was confirmed with the coronavirus on Tuesday.

The first local case was a 53-year-old woman who is the grandmother of the baby. She had traveled to Jinzhou, Liaoning, on July 16 by train and had dinner with an asymptomatic coronavirus carrier from Dalian.

The new cluster of COVID-19 cases provides a warning that residents should avoid unnecessary trips to other provinces, especially people whose family have young children or elderly members, Pang said.

She reminded residents in the city to continue to wear masks and report symptoms of fever in a timely manner.

On Wednesday, Beijing's anti-virus leading group said the city will strengthen oversight of imported cold-chain food by accelerating the formulation of standards in the sector, along with a tracing system.