There was no offence committed during former Johor chief minister Abdul Ghani Othman's visit to Singapore earlier this month, said the Ministry of Home Affairs and Ministry of Foreign Affairs on Friday.
Their joint statement came in the wake of a police report that was lodged about Mr Ghani's visit, which happened on May 2, during the Malaysian general election campaign.
The statement said the Singapore police found "no offence" disclosed in the report lodged with them.
"The acts referred to in the report such as arriving in Singapore, having breakfast or speaking to reporters do not constitute an offence."
But while Mr Ghani did not appear to be campaigning, some members of his team were wearing campaign shirts, it said.
"The Ministry of Foreign Affairs (MFA) has registered with the Malaysian High Commission in Singapore that campaigning activities by foreigners are not allowed in Singapore. In particular, the wearing of campaign shirts by some of Mr Ghani's team in Singapore during the Malaysian General Election period could be misconstrued and such cases should not recur," said the statement.
On May 2, Mr Ghani had boarded a bus to Singapore, ate breakfast at the Wendy's restaurant at Jurong East MRT station, and spoke to journalists before going back to Malaysia. He did not carry any campaign material with him.
He said then that he wanted to get a sense of Johor residents' commute to Singapore for work.
The MFA at that time said it was "surprised to learn from the media" that Mr Ghani was in Singapore to look at connectivity initiatives.
The police had also said then that nobody is allowed to publicise a cause or campaign, or demonstrate support for or opposition to any persons or government, without a police permit.