Prime Minister Tun Dr Mahathir Mohamad said Singapore's reaction to the Johor Mentri Besar's visit near disputed waters between Malaysia and Singapore was disproportionately “severe.” <br /><br />At the same time, he said the treated water rates sold to Malaysia by Singapore is long over due for a review.<br />He said this when a member of the audience posed questions on the now fraught Singapore-Malaysia ties during a dialogue session after his speech at the Oxford Union in UK.