UNITED NATIONS, Feb. 4 (Xinhua) -- UN Secretary-General Antonio Guterres was "deeply concerned" about the on-going tensions and intensification of fighting in eastern Ukraine, the UN chief's spokesman Stephane Dujarric said here on Friday.

Dujarric said at the daily news briefing that Guterres appealed to all parties in the conflict to fully observe the ceasefire and allow for immediate humanitarian access.

The UN Human Rights Office on Friday also "expressed its serious concern" over the dire humanitarian and human right situation in the country's east, according to Dujarric.

According to the office, at least seven people were killed and 41 injured in shelling between January 29 and February 3.

UN Human Rights Office teams were visiting locations and verifying reports of civilian casualties in both Donetsk city and Avdiivka, which were reportedly hit by shelling during the evening of February 2, said Dujarric.