At least 15 people were killed and 30 others wounded in a series of car bombings and shootings in central Baghdad on Thursday, an interior ministry source told Xinhua.
An explosion in the headquarters of Petroleos Mexicanos (Pemex) in Mexico City on Thursday left 14 people dead and 80 others injured, the Mexican oil giant said on its Twitter account.
A relatively new residential building in east China's Zhejiang Province collapsed on Sunday.
China's history stretching back thousands of years has seen the migration of people and mixing of ethnicities.
简体中文
