The Cold War-era rocket, which appeared to be targeted at a major air base in the kingdom's south, was brought down by Patriot missiles, officials say.
Mecca is the destination for Muslim pilgrims. To house the millions of worshippers, massive hotels are rising at a furious pace, upsetting those seeking to protect the city's traditional architecture.
The bombing of a Shiite mosque killed at least 19 people. The claim of responsibility is a first for the extremist group involving an attack inside the kingdom.
With so many restrictions on their movements, it has never been easy for Saudi women to join the workforce. But the Internet has opened up a new range of opportunities to work from home.
The temporary truce comes amid an upsurge in Saudi-led airstrikes, including one in the capital that hit the private residence of former President Ali Abdullah Saleh, said to be a rebel ally.
Saudi Arabia says the cease-fire will help get much-needed humanitarian aid into Yemen, but the offer is good only if Houthi rebels comply with the deal.
Fresh fighting around Najran comes after a nearly six-week Saudi-led air campaign against Houthi rebels. Aid agencies urge a halt to bombing Yemen's airports so humanitarian supplies can be delivered.
Saudi Arabia's King Salman shook up the monarchy on Wednesday. According to a royal decree, the king's nephew takes over as crown prince, and the king's young son becomes deputy crown prince.