SINGAPORE - Singapore is looking forward to stepping up collaboration with Germany, said Prime Minister Lee Hsien Loong on Monday (Sept 25) as he congratulates Chancellor Angela Merkel on her party's win in the federal election.

"My congratulations on your party's success at the 2017 Federal Elections! The German electorate's endorsement is a vote of confidence in your strong leadership," Mr Lee wrote in a letter released by the Ministry of Foreign Affairs.

"Singapore looks forward to stepping up collaboration with Germany in new frontiers such as connectivity, mobility, cybersecurity, start-ups and renewable energy to further enhance our excellent bilateral ties," he added.

"There is still much more that we can do together."

Dr Merkel's secured her fourth term in office on Sunday (Sept 24), with her Christian Democratic Union (CDU) and its Bavarian-based ally Christian Social Union (CSU) scoring 33 per cent of votes.