Heavy clashes between Yemeni security forces and Houthi rebels have spread across downtown Sanaa, with the country's information minister Nadia al-Sakkaf telling Al Jazeera there could be a "new Yemen" by the end of the day.br br Information Minister Nadia Sakkaf said the convoy of Prime Minister Khalid Bahah was attacked after he left a meeting with high-level Houthi representatives. br br She said a Houthi convoy had also been attacked - suggesting that a "third party" was involved. She did not specify who had attacked the convoys.