The monitoring team from the International Atomic Energy Agency, a UN watchdog, has arrived in Zaporizhzhia with the head of the delegation telling NBC News that the agency would like to establish a permanent presence at the Russian-occupied nuclear power plant, writes CNBC.

A team from IAEA arrived in the south of Ukraine around midday local time and are due to travel directly to the Zaporizhzhia nuclear power plant. They will inspect the facility over several days to assess the security and safety of the plant, which both Russia and Ukraine accuse each other of shelling.

IAEA Director-General Rafael Grossi told NBC’s Joshua Lederman that the mission will take a few days and that, in the longer term, the IAEA is also hoping to establish a “permanent presence” at the plant.

When asked whether he’s confident the mission can be carried out safely, Grossi said “of course,” despite fears that Russia could carry out what Ukraine has said could be a “provocation” during the visit. Russia has denied this and in turn, accused Ukraine of planning an attack during the visit.

Asked whether he believes Russia will allow the IAEA inspectors to see what’s really going on at the plant, Grossi said that the team was very experienced and made up of “the best and the brightest” in nuclear safety and security. “We will have a pretty good idea of what’s going on,” he says.