A bomb has exploded at a government-run hospital in the southwestern Pakistan city of Quetta, killing at least 42 people. A senior police official says that dozens more people were wounded in the Monday explosion, which took place shortly after the body of a lawyer killed in a shooting attack earlier in the day was brought in, the AP reports. PM Nawaz Sharif issued a statement expressing his "deep grief and anguish over the loss of precious human lives" and instructed local authorities in Baluchistan province, where Quetta is the capital, to maintain utmost vigilance and beef up security. The province's chief minister says it seemed to be a suicide attack, but police are still investigating. (More Pakistan stories.)