Gujarat Chief Minister Narendra Modi, who returned from abroad two days back, tested positive for swine flu today, a doctor attending on him said.

Samples of Modi were taken for test yesterday after he showed symptoms of cough, cold and fever, Atul Patel, one of the four doctors in the team looking after the Chief Minister, said.

The results came this morning, the doctor said, adding Modi had insisted on the H1N1 test.

Modi, who returned from Russia on Wednesday, will be kept in isolation for seven days at his residence, where a team of doctors are attending on him.

All his public functions have been cancelled.

"There is no cause for any concern regarding the health of the Chief minister and he is responding to treatment," Modi's doctor said.

The Chief Minister had yesterday attended office at the State Secretariat, chaired a cabinet meeting and met officers and received visitors till late in the evening. Later, his fever increased and he decided to cancel all official programmes and take the swine flu test.