Police and Shin Bet agents have arrested three Israeli citizens in two separate cases on suspicion that they carried out tasks for Iranian agents, the two agencies said in a statement on Monday.

In one investigation, 33-year-old Mark Morgein, who lives in the Jordan Valley in the West Bank, was arrested on suspicion of moving a grenade from a hidden location to another at the request of his handler, with whom he maintained contact over the course of June.

Police said he carried out this task with the knowledge that this explosive would be used to harm Israeli citizens.

He was also enlisted to film a video of a missile interception during open war between Israel and Iran and send it to his handler.

Security forces also arrested two Tiberias residents, Yoni Segal, 18, and Nehorai Omri Mizrahi, 20, whom an Iranian agent allegedly tried to recruit into murdering an unnamed Israeli citizen in exchange for hundreds of thousands of shekels.

The agent offered to fly the pair out to another country, train them, and then give them the identity of their target. The plan never came to fruition.

The two are also suspected of filming shopping malls and hospitals across the country and sending their handler information on each mall’s layout, number of security guards, and number of stores. They allegedly sent information on malls in Haifa, Tiberias, and Tel Aviv, as well as about Tel Aviv’s Ichilov hospital.

On Monday, Lahav 433 police investigators submitted a prosecutor’s declaration ahead of anticipated indictments against the suspects. The Petah Tikva Magistrate’s Court extended the remand of all three by four days, until Thursday.

There has been a rise in recent months in Israelis being arrested and charged with carrying out acts of espionage on behalf of Iran.

On Sunday, prosecutors submitted an indictment against Rishon Lezion resident Denis Liakhov for carrying out tasks on behalf of an Iranian handler, including filming streets and residential buildings in Petah Tikva while sharing his geolocation on the Telegram messaging app.

The investigation revealed that Liakhov documented the wrong area, but still received a cryptocurrency payment from his handler.

On Saturday, it was revealed that an Israeli arrested in April on suspicion of conducting intelligence-gathering missions on behalf of Iran was involved in a plot to assassinate Defense Minister Israel Katz.

Additionally, three Israelis were arrested last week during the conflict with Iran. One of the suspects is believed to have gathered intelligence on the future daughter-in-law of Prime Minister Benjamin Netanyahu, Hebrew media reported, and another is believed to have photographed the homes of public officials and military bases.

In May, 18-year-old Moshe Attias of Yavne was charged with spying on former prime minister Naftali Bennett while the latter was hospitalized.

Additionally, in January, authorities said they arrested two IDF reservists — Yuri Eliasfov and Georgi Andreyev, both 21 — for allegedly passing sensitive material about the Iron Dome missile defense system to Iran in exchange for payments as small as $50.