An official session of talks was co-chaired here Sunday morning by Sheikh Hamad bin Khalifa Al Thani, the Emir of Qatar and Doris Leuthard, President of the Swiss Federation. The session was attended by Prime Minister and Foreign Minister Sheikh Hamad bin Jassim bin Jaber Al Thani and a number of ministers. It was attended by several members of the Swiss delegation and Swiss ambassador to Qatar. The talks dealt with ties of cooperation between the two countries and ways of developing them in various fields, in addition to a number of regional and international issues of common concern, the Qatari News Agency "QNA" reported.