Three men including a father-sonduo were arrested here when they were allegedly found preparing grape wine and another gruel-based intoxicant at their home here, police said on Monday.Following a tip-off and surveillance, when a team of police personnel checked a house at Kodungaiyur in north Chennai, it was found that wine was being prepared there by a 56-year old man, his 26-year old son and another youth.Following searches, about 30 litres of grape based wine and five litres of another intoxicant -popularly known as 'sunda kanji' in Chennai, which is a gruel made from ingredients like rice and left to naturally ferment were seized from the premises.After an enquiry, all the three men were arrested, police said.Since March 24 evening, state-run TASMAC liquor outlets are shut in Tamil Nadu.