Russia has limited mobile internet services in Moscow on Tuesday ahead of the annual victory parade commemorating the end of World War II, which has been downsized this year due to concerns about potential Ukrainian drone attacks.

According to Reuters reporters, President Vladimir Putin's opponents argue that this move is part of an attempt by the Kremlin to strengthen domestic control following four years of war.

The Russian government claims these restrictions are necessary for security reasons in light of heightened risks from Ukrainian drones.

Multiple Reuters reporters in Moscow reported that mobile internet was inaccessible on their phones across various parts of the capital, though telephone calls remained available in many areas.

Mobile phone operators in Russia have indicated potential issues with mobile internet due to security measures planned over the coming days.

Sberbank, Russia's largest bank, has also warned about possible disruptions to mobile internet and messaging services.

Yandex's taxi service unit has noted that there may be problems with ordering taxis online as a result of these internet limitations.

The ongoing conflict between Russia and Ukraine, marked by drone warfare on both sides targeting command points and energy infrastructure, continues four years after the invasion in 2022.

This is described as the largest drone war ever fought, extending beyond 'death zones' created by short-range drones near front lines.