Marin Mrčela also calls on EU to join Group of States Against Corruption to show it is serious about tackling misconduct

Political parties across Europe, including the UK, should be forced to publish the names of their private funders before elections, not after, the president of the Council of Europe’s anti-corruption body has said.

Unveiling the annual report of the Group of States Against Corruption (Greco), Marin Mrčela, who is the justice of the supreme court of Croatia, also called on the European Union to stop using “excuses” not to join the body.

Security services say spate of fires and infrastructure attacks could be part of attempt by Russia to destabilise continent

• Russia-Ukraine war – latest news updates

Security services around Europe are on alert to a potential new weapon of Russia’s war – arson and sabotage – after a spate of mystery fires and attacks on infrastructure in the Baltics, Germany and the UK.

When a fire broke out in Ikea in Vilnius in Lithuania this month, few passed any remarks until the Polish prime minister, Donald Tusk, suggested it could have been the work of a foreign saboteur.

Ukrainian leader says it would not be ‘strong decision’ if Joe Biden fails to attend talks next month to which Russia is not invited

• Russia-Ukraine war – latest news updates

Volodymyr Zelenskiy has said Vladimir Putin will give a standing ovation to Joe Biden if the US president fails to attend a peace summit in Switzerland next month.

On a visit to Brussels where he signed a 10-year security pact with Belgium, the Ukrainian leader said it would not be “a strong decision” if Biden failed to attend the talks scheduled for 15-16 June near Lucerne.

Pedro Sánchez, the prime minister, says the funding will improve Kyiv’s air defences, just days after Russia killed 18 people in Kharkiv

Spain will provide Ukraine with €1bn in military aid this year after the Spanish prime minister, Pedro Sánchez, and Ukraine’s president, Volodymyr Zelenskiy, met in Madrid to sign an “enormously important”, decade-long defence and security deal.

Although the precise details of the agreement have not been made public, the Spanish government said its assistance would “allow Ukraine to prioritise its capacities, including its air defences”.

Comments come as Commission president hints EU could impose tariffs on Chinese electric vehicles

• Business live – latest updates

Janet Yellen, the US treasury secretary, has urged the EU to intervene urgently to dampen the growing export levels of Chinese cut-price green technology including solar panels and wind turbines, pushing European leaders to move to a full-scale trade war.

At the same time she urged German bank executives on Tuesday to step up efforts to comply with sanctions against Russia and shut down efforts to circumvent them to avoid potential penalties themselves that could see the US cut them off from dollar access.