COLOMBO, Jan 11 (Reuters) - Sri Lanka's government on Friday rejected a Tamil Tiger offer to abide by the terms of a newly-scrapped 6-year ceasefire, and vowed to push on with a military campaign to crush the rebels.

"While the CFA (ceasefire agreement) was on they attacked civilian targets. So what they are trying to do is take cover under this and then unleash terror activities," Keheliya Rambukwella, a minister and government defence spokesman, told Reuters.

"We will be going on with our liberation operations. We need to liberate the whole country from terrorism," he added. "We will flush them out."

The Tigers said on Thursday they were ready to implement the terms of a truce Nordic monitors say they have violated thousands of times.

(Reporting by Ranga Sirilal, Writing by Simon Gardner; Editing by Sanjeev Miglani)

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