Muammar Gaddafi, the Libyan leader, is facing a stark ultimatum to either stop the attacks on civilians, or face military action.
But even after the ceasefire was announced, people on the ground were telling Al Jazeera of new attacks.
An opposition spokesperson told Al Jazeera English he could hear shelling from tanks as the army tried to enter the city of Misurata.
Witnesses speaking to our Arabic sister channel said the city of Ajdabiya, further east, was also being bombarded.
The Libyan government has denied the claims, as Al Jazeera's Gerald Tan reports.
Source: Al Jazeera