In Pics: As Pakistan gears up for election day on Wednesday, the country remains on high alert

A supporter of Bilawal Bhutto Zardari, chairman of the Pakistan Peoples Party (PPP), wears a party cap with a photo of him and assassinated former Prime Minister Benazir Bhutto, as he waits with others to welcome him during a campaign gathering, ahead of general elections, at the airport in Karachi - Reuters

In this picture taken on June 21, 2018, the head of Pakistani militant organisation Jamaat-ud-Dawa (JuD), Hafiz Saeed (C), attends an election campaign meeting in Islamabad.Pakistans politicians, including PM hopeful Imran Khan, are mainstreaming extremism by invoking hardline issues like blasphemy to get votes, analysts say, warning the tactic could deepen sectarian fractures and potentially spill into violence - AFP

The head of Sunni Muslim religious party Tehreek-e-Labbaik Ya Rasool Allah (TLYRA), Khadim Hussain Rizvi (C), attends an election campaign rally in Karachi.Pakistan's politicians, including PM hopeful Imran Khan, are mainstreaming extremism by invoking hardline issues like blasphemy to get votes, analysts say, warning the tactic could deepen sectarian fractures and potentially spill into violence - AFP

In this picture taken on June 28, 2018, Pakistani workers print election posters with an image of the head of Sunni Muslim religious party Tehreek-e-Labbaik Ya Rasool Allah (TLYRA), Khadim Hussain Rizvi (top), for the upcoming parliamentary elections at a printing press in Rawalpindi - AFP

Pakistani supporters of the Sunni Muslim religious party Tehreek-e-Labbaik Ya Rasool Allah (TLYRA) ride on bikes with election posters displaying party head Khadim Hussain Rizvi during an election campaign rally in Karachi.  - AFP

Supporters of Pakistani cricket star-turned-politician and head of the Pakistan Tehreek-e-Insaf (PTI) Imran Khan (unseen) stand behind barbed wire during a campaign meeting ahead of the general election in Lahore on July 23, 2018 - AFP

Pakistani army soldiers examine a box ahead of the elections in that country that will take place on Wednesday - AFP

Shahbaz Sharif, brother of ex-prime minister Nawaz Sharif, and leader of Pakistan Muslim League - Nawaz (PML-N) reacts as he addresses his supporters during a campaign rally ahead of general elections in the Lyari neighborhood in Karachi - Reuters

Pakistani politician Imran Khan, chief of Pakistan Tehreek-e-Insaf party, addresses his supporters during an election campaign in Lahore, Pakistan, Monday, July 23, 2018. Pakistan will hold general elections on July 25 - PTI

Bilawal Bhutto Zardari, chairman of the Pakistan Peoples Party (PPP), speaks to supporters using hologram technology during election campaign in Islamabad - Reuters