The Israeli military, responding on Friday to a Reuters investigation that determined its forces killed a Reuters journalist in southern Lebanon on Oct. 13, said the incident took place in an active combat zone and was under review.

Without directly addressing the death of visuals journalist Issam Abdallah, a military statement said Lebanese Hezbollah fighters had at the time attacked across the border and Israeli forces opened fire to prevent a suspected armed infiltration.

A Reuters special report published on Thursday found that an Israeli tank crew killed Abdallah and wounded six reporters by firing two shells in quick succession from Israel while the journalists were filming cross-border shelling.

Israel's statement on Friday said that on Oct. 13, Iranian-backed Hezbollah militants launched an attack on multiple targets within Israeli territory along the Lebanese border.

"One incident involved the firing of an anti-tank missile, which struck the border fence near the village Hanita. Following the launch of the anti-tank missile, concerns arose over the potential infiltration of terrorists into Israeli territory," the Israel Defence Forces (IDF) said in a statement.

"In response, the IDF used artillery and tank fire to prevent the infiltration. The IDF is aware of the claim that journalists who were in the area were killed.

"The area is an active combat zone, where active fire takes place and being in this area is dangerous. The incident is currently under review," it said.

The strikes killed Abdallah, 37, and severely wounded Agence France-Presse (AFP) photographer Christina Assi, 28, just over a kilometre from the Israeli border near the Lebanese village of Alma al-Chaab.

Amnesty International said on Thursday that the Israeli strikes were likely to have been a direct attack on civilians and must be investigated as a war crime.

In a separate report Human Rights Watch (HRW) said the two Israeli strikes were "an apparently deliberate attack on civilians and thus a war crime" and said those responsible must be held to account.

U.S. Secretary of State Antony Blinken said on Thursday it was important that Israel's inquiry into the killing reach a conclusion and for the results to be seen.

"My understanding is that Israel has initiated such an investigation, and it will be important to see that investigation come to a conclusion, and to see the results of the investigation," Blinken said at a press conference.