Malaysia's foreign ministry has summoned a senior Singaporean diplomat over allegations that the city-state has helped the US and Australia tap telecommunications links in Asia for espionage.
Singapore's government has not publicly responded to the allegations, which were published on Monday in the Sydney Morning Herald and cite documents from National Security Agency leaker Edward Snowden.
Foreign Minister Anifah Aman said in a statement that his ministry was seeking clarification from Singapore's high commissioner, or ambassador, to Malaysia.
"If those allegations are eventually proven, it is certainly a serious matter that the government of Malaysia strongly rejects and abhors," Anifah said.
He said that spying against a good friend and neighbour was unacceptable.
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Anifah's ministry earlier this month protested to US and Australian embassy officials over accusations that their diplomatic missions house surveillance equipment used to collect electronic communications.
The Sydney Morning Herald report said a National Security Agency map published by Dutch newspaper NRC Handelsblad this past week confirmed that Singapore played a role in helping the US and other intelligence partners tap undersea cables.
Similar spying allegations have rocked relations between Indonesia and Australia, with Jakarta recalling its ambassador, downgrading relations and suspending cooperation on people smuggling after reports of Australian tapping the phones of Indonesia's president, his wife and eight Indonesian ministers and officials in 2009.
Indonesia's president said on Tuesday he will send a special envoy to Australia to discuss creating a code of conduct that would allow the two countries to continue cooperating on issues including intelligence information sharing.
