Two motorcyclists fired ten rounds at al-Batsh during the early hours of Saturday morning as he was on his way to a nearby mosque for dawn prayers.
Malaysian police have released a photo of one of the two suspects in the killing of a Palestinian engineer, and say the duo could still be in the country.
"[Israel] can not stand that there are Arab and Muslim minds that identify with the Arab-nationalist ideology, and that is why it took out scientists from Iran, from Tunisia and also Lebanese scientists", Nasrallah told supporters. "Following the discovery of the motorcycle near Tasik Danau Kota, we manage to obtain this photograph of one of the suspects".
He said he did not know if the perpetrators were still in the country.
The new photo shows a light-skinned man with dark, wavy hair and a prominent goatee.
Yasser Murtaja, a Palestinian cameraman, was killed three weeks ago also while covering the six-week rallies and protests organized in the Gaza Strip between the eastern areas of the coastal enclave and Israel. His younger brother, Rami Albatsh, who arrived from Germany on Sunday evening, was also there to facilitate the process of flying his body back to Gaza through Egypt this evening.
The Hamas-run Health Ministry reported at least seven Gazans were killed in the day-long violence, hours after another Gaza man was killed at the border in disputed circumstances.
The bodies of the two soldiers - Hadar Goldin and Oron Shaul - are now being held by Hamas, along with two Israeli civilians, Avera Mengistu and Hisham al-Sayed, who entered Gaza of their own volition in 2014 and 2015, respectively.
Israel has always been suspected of involvement in a series of assassination attempts on the lives of Hamas commanders, many of them outside of Gaza and the West Bank.
The Mossad is believed to have assassinated Palestinian militants and scientists in the past, but rarely confirms such operations.
Al-Batsh, an electrical engineering lecturer at a Malaysian university, was believed to have been working on Hamas' unmanned aerial vehicle program and was working on improving the accuracy of its rockets.