Ukraine says it has detained four members of a “pro-Russian nongovernmental organization" suspected of plotting to blow up a block of apartments in the capital, Kyiv.

The Security Service of Ukraine (SBU) said on September 3 that the four men planned to blow up a building in Obolon district.

It said the group resisted arrest and threw a hand grenade at special forces as they were seized.

One of the suspects was wounded in the leg as SBU agents fired back.

The SBU said the group's leader planned to flee after the planned attack to the Crimean Peninsula, which was annexed by Russia in March 2014.

Kyiv has regularly accused Russia of attempting to destabilize the situation in Ukraine as fighting between government forces and Russian-backed separatists the country's east has claimed more than 6,500 people since April last year.

Based on reporting by AFP and Interfax