Kosovo police said on Thursday that they prevented simultaneous attacks by the Islamic State group, including on the Israeli national football team that played a World Cup qualifier in neighbouring Albania.

A police statement said plans were in place to attack Saturday’s match in Albania, and at the same time attack another target in Kosovo. Nineteen people were detained in Kosovo on 4 November, of whom one has since been released, police there said. Albania and Macedonia announced six more people were detained.

The Kosovo police said that at the suspects’ homes and premises officers found explosive devices, weapons and electronic equipment, including “religious material and literature from well-known authors recognised for their extremist ideology”.

The groups in the three countries, coordinated by two Albanians who are part of the IS terror group in Syria, had “clear targets on who and when should be attacked”, police said.

The venue of the qualifier was changed for “security reasons” from the northern city of Shkoder, near the border with Montenegro, to Elbasan, much nearer to the capital Tirana. Israel won the match 3-0.

Both Kosovo and Albanian authorities claim that no more of their citizens have joined the rebel groups in Syria and Iraq over the past year, but scores of them remain active with Isis fighting groups.