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NATO jets scrambled today to shoot down a drone that crossed into Latvian airspace close to its border with Russia.

The incursion in the Balvi municipality came amid a heavy Ukrainian strike on major Russian oil post Ust-Luga, which ignited infernos at the Gulf of Finland complex.

The kamikaze drone had been redirected into the Latvian airspace by Russian 'electromagnetic warfare', said a Defence Ministry statement in Riga.

'NATO Baltic Air Policing mission fighters were scrambled in response to the threat in Latvian airspace.'

Airspace threats had been declared in five border municipalities in the Baltic state, with airspace curbs also imposed in Finland.

Fighters 'successfully shot down a foreign unmanned aerial vehicle that had entered Latvia as a result of Russian electromagnetic warfare.'

The drone was likely Ukrainian and involved in a mass four-hour strike on the Leningrad region around St Petersburg - but was disrupted and redirected by Russian air defences.

NATO jets scrambled today to shoot down a drone that crossed into Latvian airspace close to its border with Russia. [File photo]

The Russian authorities confirmed that the Ust-Luga was ablaze, and had suffered damage as they country’s air defences overnight downed 553 Ukrainian drones.

It is Russia's biggest Baltic port—a vital oil-export and sanctions-evasion hub with revenues sustaining Vladimir Putin's war economy.

Regional governor Alexander Drozdenko said: 'As a result of the attack, damage was recorded and a fire broke out in the port of Ust-Luga. Specialists have begun extinguishing the fire.'

The threat to NATO airspace followed concerning incidents in other alliance states amid warnings of Russian provocations in Western states.

An explosion tore through an Italian ammunition plant that supplies the Ukrainian armed forces, and one person was killed and six injured at an oil terminal explosion in the Port of Rotterdam, at a facility linked to Gunvor Energy, a subsidiary of oil trading company Gunvor, founded by close Putin associate, Gennady Timchenko.

Putin was also hit by a major fire at the October Revolution Shipbuilding Plant in Blagoveshchensk, six time zones east of Moscow, where a fuel and lubricants warehouse was ablaze.

It was not immediately clear if the inferno was linked to Putin's war.

There were major strikes on both sides of the frontline in the contested Donetsk region of Ukraine.

Volodymyr Zelensky's forces destroyed the huge Galaktika shopping centre in Russian-held Yenakiieve, triggering a major explosion at a site used by Putin's forces.

In Ukrainian-controlled Kramatorsk, the Russians attacked civilians, hitting an apartment building, leaving a gaping hole.

In Ukrainian-controlled Kramatorsk, the Russians attacked civilians, hitting an apartment building, leaving a gaping hole

A woman was seen being carried out of the carnage in which one died and dozens were injured with people buried under rubble

Separately in border region Sumy, Putin's forces killed a 29-year-old woman and her nine-year-old son in a kamikaze drone strike on a residential building

A woman was seen being carried out of the carnage in which one died and dozens were injured with people buried under rubble.

Separately in border region Sumy, Putin's forces killed a 29-year-old woman and her nine-year-old son in a kamikaze drone strike on a residential building.

Four more people were injured, according to Oleg Grigorov, head of the regional military administration.

The boy's father and grandmother are in the hospital with severe burns.

Such Russian attacks led to Ukraine suffering the highest number of civilian deaths in a month since May 2022.

A total of at least 437 people were killed and 2,610 injured in July, 30% higher than in June, according to the UN monitoring mission.

This is a breaking news story. More to follow.