LONDON (AP) — Britain's Home Secretary will chair a meeting of the government's emergency committee during which ministers will be briefed on the mysterious collapse of a former spy and his daughter.

The Cobra committee meets Wednesday as counterterrorism police investigate the suspected poisoning of Sergei Skripal and his daughter, Yulia, who collapsed Sunday on a public bench in southern England after they came into contact with an unknown substance.

While police say they are keeping an open mind, the case has reminded Britain of the 2006 poisoning of former spy Alexander Litvinenko, which was blamed on the Russian state.

Foreign Secretary Boris Johnson told lawmakers Tuesday that Britain would act — and possibly limit its participation in the upcoming soccer World Cup in Russia — if Moscow is shown to have been involved.