Langkah Oman itu mewakili sokongan politik dan moral, selain menyokong perjuangan rakyat Palestin mendapatkan hak mereka.
Alasan di sebalik penahanan itu tidak jelas dan tentera Israel belum mengeluarkan sebarang kenyataan rasmi.
Rights groups view such demolitions as collective punishment, even as Israel's Supreme Court upholds the practice, which Israeli officials deem punitive and a deterrent to potential attackers.
Israeli troops entered the Amari Refugee Camp to search for suspects in the killing of a soldier.
Palestinian President Mahmoud Abbas was hospitalised in Ramallah.
Hamdallah was uninjured in the March 13 attack, which saw a roadside bomb explode as his convoy entered Gaza in what Palestinian officials have called an assassination attempt.