Thai opposition protesters on Tuesday besieged several more government ministries as part of their efforts to topple Prime Minister Yingluck Shinawatra's government, according to a government minister and AFP reporters. "We have to leave because they (the protesters) will cut the utilities," tourism and sports minister Somsak Pureesrisak told AFP, adding that the transport and agriculture ministries were also surrounded. Demonstrators also gave officials at the interior ministry an ultimatum to leave within one hour, according to an AFP reporter at the scene, a day after they occupied the finance and foreign ministries.