Warplanes of the Saudi-led military coalition bombed targets in the Yemeni capital on Sunday for the first time since Saudi officials said they were shifting the focus of their campaign against a Yemeni rebel group toward political negotiations and humanitarian relief.

Also on Sunday, at least seven people were killed and dozens wounded in escalating violence in the southern city of Taiz, which was emerging as the latest lethal flash point in Yemen’s civil war.

In addition to the bombings in Sana, the capital, which struck a military base and the presidential palace, the coalition carried out airstrikes in several other provinces, suggesting a broadening, rather than a scaling back, of the monthlong Saudi air offensive against Houthi rebels. […]