Authorities at Heathrow Airport after eight planes were on lockdown amid the coronavirus.

Coronavirus fears sparked a lockdown of eight planes Friday morning at Heathrow Airport — including a flight from California — after passengers complained they were suffering from symptoms, according to new reports.

Passengers on United Airlines Flight 901 from San Francisco were told by the captain to stay put after landing because someone on board might be infected, the Daily Mail and ITV reported.

British passenger Andy West told the Mail the captain said they might not move for a while because “seven other planes” had suspected cases as well.

Further details involving the other aircraft are unknown. Heathrow Airport declined to comment but is believed to be running as normal with all runways open, the Mail reports.

Staff on the morning United Airlines flight — none of whom were wearing protective gear — brought the passenger to the back of the plane and waited for health officials to arrive in hazmat suits, West said.

“The captain came on and said there was a suspected case of coronavirus and that the authorities would board the plane to confirm whether or not it was,” West told ITV.

“[The captain] also [said] that there were seven other flights that had landed, so he wasn’t sure how long it would be until we would be able to disembark.”

The whole ordeal ended up taking about 20 to 25 minutes, and although no one was panicking, West said worry did start to set in.

“I won’t deny, it made me feel nervous,” he said. “To be potentially that close to something like that is a worry, but I guess what we have to do now is wait and see whether the case is actually confirmed.”

Passenger Neerag Malhotra tweeted that passengers were stuck “waiting for doctor confirmation” and that the affected person was “isolated at the back of the plane.”

United Airlines confirmed that someone was not feeling well on the plane but did not elaborate.

“Our team at London Heathrow Airport is providing assistance related to United flight 901 (San Francisco-London Heathrow) today, following reports of an individual becoming unwell onboard,” the airline said in a statement to multiple outlets. “The safety of our customers and employees is our highest priority and we continue to work closely with local authorities.”

It’s unclear what happened to the passenger who complained of possible symptoms, or where the person traveled from.

The airport, as well as Public Health England, has so far declined to comment, according to local reports.

Meanwhile, British Member of Parliament Alex Sobel tweeted Friday that he would be tested for coronavirus after attending the UK Bus Summit with someone confirmed to have the infection — though he has not exhibited any symptoms himself.

“I attended the UK bus summit on the 6th Feb, where there was an attendee who has tested positive for coronavirus,” he wrote. “Whilst I have been informed that I am at very low risk, I have called 111 to be formally assessed.”

His engagements have been canceled until Thursday, he said.

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Lilian Greenwood, another Parliament member who attended the summit, said she too has canceled her engagements until Thursday “to be extra-cautious.”