The Israeli army detained three prominent Hamas leaders the occupied West Bank city of Hebron.
Eyewitnesses told Anadolu Agency that an Israeli soldier detained Hatem Qaffeisha, 58, a top Hamas leader in Hebron and a Palestinian lawmaker.
Former Local Governance Minister Isa Al-Jabari, 55, and top Hamas figure Mazen Al-Natsha, 49, were also detained.
The three figures have been jailed several times by the Israeli army.
In February, key Hamas members were detained including Mustafa Al-Shannar, Adnan Asfour, Yaser Mansour, Khalid El-Haj, Abdel-Basit El-Haj, Omar Al-Hanbali and Faze' Sawafteh.
Hamas says the Israeli authorities aim to disrupt the Palestinian elections and affect the results.
Hamas also accused the Israeli authorities of threatening its members with imprisonment if they run in the upcoming elections.
Palestinians are scheduled to vote in the legislative elections on 22 May, presidential polls are to be held on 31 July and the National Council elections on 31 August.
The last legislative elections were held in 2006, with Hamas coming out on top.