Iran's Revolutionary Guards said that 12 people were arrested for reportedly collaborating with Israel and "planning acts against Iran's security."
"As the Zionist regime (Israel) and their Western backers, most notably the United States, have not succeeded in their sinister goals against the people of Gaza and Lebanon, they are now seeking to spread the crisis to Iran with a series of actions planned against our country's security," the statement said.
Tensions in the Middle East have shot up since thousands of pagers and walkie-talkies used by Lebanon's Hezbollah members exploded in an attack widely blamed on Israel. Hezbollah and Israel have exchanged some of the heaviest cross-border fire in a conflict running in parallel to the almost year-long Gaza war.
The Revolutionary Guards added that members of the network of 12 operatives were arrested in six different Iranian provinces, but did not say when.
In late July, the political leader of Palestinian group Hamas, Ismail Haniyeh, was killed in Tehran in an assassination blamed on Israel by Iranian authorities. Israel has made no claim of responsibility. Since then, tensions in the region have notably increased, with the the threat of a full-scale regional war looming.
At least 24 people were killed and 93 others wounded when Israeli airstrikes hit a mosque and a school sheltering displaced people in the Gaza Strip early on Sunday, the Hamas-run Gaza government media office said.
Russian air attacks on Ukraine kept the eastern half of the country under air raid alert for more than five hours, Ukraine's military said early on Sunday, with Moscow launching several waves of strikes targeting Kyiv and other cities.
Massive consecutive strikes hit Beirut's southern suburbs from late Saturday into Sunday, sending booms across the city and sparking flashes of red and white for nearly 30 minutes visible from several kilometres away.
Over 80 police personnel have been injured in clashes with supporters of jailed former Prime Minister Imran Khan taking part in a march near Islamabad, Interior Minister Mohsin Naqvi said on Saturday.
Ukraine will present its "victory plan" at a regular meeting of its allies at Ramstein in Germany on October 12, President Volodymyr Zelenskiy said in a post on Telegram on Saturday.