Accra, Sept. 1, GNA - President John Evans Atta Mills, returned home on Wednesday evening from Switzerland, after a three-day official visit.

He was met on arrival by Vice President, John Dramani Mahama, Ministers of State, and Senior Military and Police officers.

Briefing newsmen, President Mills said Switzerland had been Ghana's development partners for a long time, which made identifying potential areas of mutual gain quite easy.

He said interaction with a cross section of Swiss businessmen held great prospects of drawing Swiss investors to Ghana.

On the Atiwa by-election, President Mills said: "the most important thing is that the election was successful".

"There would always be winners and losers. I am sending a note of caution to the NPP. In 2012, we would give them a run for their money", President Mills said.