Militant attacks in Pakistan have killed hundreds of people over the past three years, including many women and children. On Friday, security forces carried out sweeping raids, gunning down and arresting dozens, a day after a massive suicide bombing killed 75 worshippers at a Sufi shrine in the country's south.

The attack, claimed by an Islamic State affiliate in Pakistan, raised questions about the ability of the authorities to rein in militant groups despite several recent offensives targeting insurgents.

Here are some of the deadliest attacks in Pakistan in the last three years:

2017:

__Feb. 16: An Islamic State suicide bomber strikes inside a famed Sufi shrine in southern Sindh province, killing at least 75 people as worshippers performed a devotional dance known as "dhamal."

__Feb. 13: A suicide bomber hits in the heart of the Punjab capital of Lahore, killing 13 people, including three senior police officials. A breakaway Taliban faction claims responsibility.

2016:

__Nov. 12: Suicide bombing claimed by the Islamic State group kills 50 worshippers at a packed Sufi shrine in southwestern Baluchistan province.

__Oct. 25: Gunmen storm a police academy in the southwestern city of Quetta, killing 61 people, mostly cadets and trainees;

__Sept. 16: Suicide attack kills 36 worshippers in a Sunni mosque in the northwestern tribal region of Mohmand;

__Aug. 08: Suicide bombing kills more than 70 people at a gathering of lawyers on the grounds of a government-run hospital in Quetta;

__March 27: Bombing on Easter Sunday kills 65 people in the eastern city of Lahore, in a park crowded with Christians, including many children;

__March 16: Bomb rips through a bus carrying Pakistani government employees in the volatile northwestern city of Peshawar, killing 15 people;

__March 7: Suicide bomber attacks the entrance in northwestern Pakistan, killing 11 people;

__Jan. 20: Islamic militants storm a school in Charsadda in northwestern Pakistan in an hours-long attack, killing at least 20 people;

2015:

__Sept. 18: Taliban storm a military air base used as a residential area on the outskirts of Peshawar, killing 29 people, including 16 praying inside a mosque;

__Aug. 16: Suicide bombing at the home of Punjab province's home minister, Shuja Khanzada, kills 18 people, including the minister and a senior police officer;

__May 29: Gunmen hijack a bus and kill 22 people near Pishin district in southwestern Baluchistan province;

__May 13: Gunmen storm a bus carrying Shiite Muslims in the southern city of Karachi, killing 45 people;

__April 11: Gunmen in restive southwestern Pakistan kill 20 workers at a dam construction site;

__March 17: Two suicide bombers attack two churches in the eastern Pakistani city of Lahore as worshippers pray inside, killing 15 people;

__Feb. 14: Taliban militants storm a Shiite mosque in Peshawar, killing 20 people;

__Jan. 30: Suicide bombing at a Shiite mosque in southern city of Shikarpur kills 59 people;

2014:

__Dec.16: Militants attack an army-run school in Peshawar, killing over 150 people, mostly schoolchildren;

__Nov. 2: Taliban suicide bombing kills 60 in an attack on a paramilitary checkpoint close to the Wagah border crossing with India;

__June 9: Ten gunmen disguised as police guards attack a terminal in Karachi, Pakistan's busiest airport, killing 13 people during a five-hour siege.

__June 8: Suicide bombing in the country's southwest kills at least 23 Shiite pilgrims returning from Iran.