An Australian teacher who went missing in India for two weeks has allegedly been murdered by his brother in an "unthinkable act of betrayal".
Melbourne maths teacher Sunil Sharma disappeared on May 22 after he travelled to Amritsar in India's northwestern Punjab province.
Local police said on Sunday morning Australian time investigations into the disappearance revealed Mr Sharma was allegedly murdered over a property he owned.
Four accused have been arrested as part of the investigation, Amritsar Local Police said.
Indian police allege Mr Sharma's brother Satish spiked his drink with sleeping pills before dealing fatal blows to his head with a baseball bat.
His body was allegedly dumped in a canal, with police continuing to search for his remains.
