Aiya.

MY only need to cut water and food supply. Everyone on the island will starve to death. No need to bomb here and there. Expensive.

Singapore has been importing water from Johor, under two bilateral agreements. The first agreement was officially signed on October 1961 and expired in August 2011. The second agreement was signed on September 1962 and will expire in 2061. A maximum of 250 million gallons of water a day can be drawn from the Johor River under the agreement. Imported water can supply up to 60 percent of Singapore's water needs.