Putin says Russia ‘building up power’ of its navy; drone attack on Moscow damages two office blocks

• Russia-Ukraine war – latest news updates

President Vladimir Putin praised Russia’s navy in an address at the annual Navy Day parade. He announced 30 new ships this year as he said Russia was “building up the power” of its navy.

Putin has said African and Chinese proposals could serve as a basis for finding peace but added elements were “difficult or impossible” to implement. He was speaking at a press conference after meeting African leaders in St Petersburg.

A night-time drone attack on Moscow damaged two office blocks, the mayor of the Russian capital said early on Sunday, Russia’s state news agency Tass reported. The capital’s Vnukovo airport was temporarily shut. City mayor Sergei Sobyanin posted on Telegram that there were “no victims or injured”. However, Tass reported a security guard had been injured in the attacks.

Ukraine’s ministry of defence has said Saturday’s Russian missile attacks killed one person and 10 were injured in Sumy. In Zaporizhzhia two people died and two were injured.

Moscow said on Sunday its forces had thwarted a Ukrainian attempt to attack Russia-annexed Crimea with 25 drones overnight.

The latest UK Ministry of Defence (MoD) update says satellite imagery captured on 19 July has identified approximately 300 tents and 200 vehicles in Tsel, Belarus, where Wagner troops have likely established a military camp there. The MoD said it was unclear what happened to the heavy equipment Wagner used in Ukraine, suggesting it was possible it was forced to return these to the Russian military.

Pope Francis has called on Russia to revive the Black Sea grain deal, through which Moscow had allowed Ukraine to export grain from its seaports despite the war.

The general staff of Ukraine’s armed forces said Russia has lost 245,700 troops in Ukraine since the start of the war. According to the report, as of 9am (EET) on 30 July, Russia has also lost 4,205 tanks, 8,178 armoured fighting vehicles.

Ukrainian soldiers fired UK-donated AS90 self-propelled artillery guns to mark the end of their training in south-west England. British army instructors taught the 72 Ukrainian army personnel how to operate and maintain the guns when in combat, the UK Ministry of Defence (MoD) said.

The Associated Press has reported that Saudi Arabia will host a Ukrainian-organised peace summit in early August.