Iran said Sunday it was not sure Israel would maintain the ceasefire in place since last Tuesday, after 12 days of unprecedented clashes between the two enemies.

The conflict erupted when Israel launched airstrikes against Iran on June 13, killing senior military officials and several scientists linked to Iran's nuclear program.

We did not provoke the war, but we responded to the aggressor with all our might, Iranian armed forces Chief of Staff Abdolrahim Mousavi said Sunday, referring to Israel, state television reported.

"We have serious doubts about the country's respect for its commitments, including the ceasefire, and we are ready for a strong response if it repeats the aggression," Mousavi added in a telephone interview with Saudi Defense Minister Prince Khaled bin Salman, according to Iranian television.

Israel maintains it acted to prevent Iran from developing weapons nuclear weapons, an accusation Tehran denies, claiming its nuclear program is for civilian purposes.

During the 12-day war, the United States participated in the Israeli offensive and bombed three nuclear facilities in Iran on June 22. A cessation of hostilities has been in effect since Tuesday, June 24.