Israeli troops have detained another Palestinian member of parliament during an overnight raid in the West Bank.
The Islamic Jihad militant killed in Jenin was buried on Monday
Fadl Hamdan, who is from the governing Hamas movement, was seized when troops raided his house in Ramallah. Israel has not said why it took him.
The incident came a day after Israeli forces detained the Hamas speaker of the Palestinian parliament, Aziz Dweik.
Israeli troops killed a militant near the West Bank town of Jenin on Sunday.
The man, a wanted member of the Islamic Jihad group, was killed when he refused to surrender and troops moved against the house where he was staying, Palestinian witnesses were quoted by The Associated Press as saying.
An Israeli military spokeswoman quoted by Reuters said the troops had come under fire.
In the northern Gaza Strip, an Israeli air strike destroyed a house on Monday but there were no reports of casualties.
Israel has detained about 30 MPs and a third of the Palestinian cabinet in the past six weeks.
Palestinian officials have called on the international community to intervene to secure their release.
Palestinian officials say a number of government workers have been taken to hospital in Ramallah after one of them opened a suspicious package addressed to Palestinian Prime Minister Ismail Haniya.
Palestinian deputy Prime Minister Nasser al-Shaer has accused Israel of trying to assassinate him and Mr Haniya.
Reports said the package contained an unknown substance, which caused the workers to suffer breathing difficulties and headaches.
The package was delivered to the Palestinian cabinet building in Ramallah.
Officials said it was not immediately clear who had sent it, or what the substance it contained was.