QUETTA (PAKISTAN), Dec. 30, 2021 Ambulances are seen at the blast site in Quetta, southwestern Pakistan, on Dec. 30, 2021. A bomb went off in Pakistan's southwestern Quetta city, capital of Balochistan province, on Thursday, leaving at least four people killed while injuring 15 others, hospital officials said. (Credit Image: © Asad/Xinhua via ZUMA Press)