It also denies statements by Misrata residents that the government has cut off electricity and water supplies to the city, and says it is doing everything to help civilians.
Mussa Ibrahim, the government spokesman, said Libya welcomed the ICRC's arrival and would help it with its work.
"In Misrata, the Libyan government has done a wonderful (job)," he said. "We have helped evacuate tens of thousands of people. We moved them to other cities, we provided them with food and medicine.
"We insist, and this is our position, that whatever damage that was caused in Misrata was the result of people taking up arms against the legitimate government of Libya, causing chaos and death in the streets in Misrata."