A court in Kuwait gave death penalty to an Iranian and one Kuwaiti man on Tuesday for espionage with Iran and Hezbollah. The case also included the weapons' possession.
Twenty-four Kuwaitis have also been convicted along the pair. One of the convicts sentenced to life in prison while three were found innocent and one was fined. Nineteen others were sentenced to prison between five and 15 years.
Kuwaiti officials said in August that they found large quantities of arms, explosives and ammunition when they had dismantled an Iran-linked cell.
The verdicts came amid growing diplomatic dispute between Iran and Gulf countries after Saudi Arabia's execution of Shiite cleric Nimr al Nimr this month.
The day after the executions, the Saudi embassy in Iran was attacked by protesters.
Riyadh in response cut diplomatic ties with Iran, while Saudi allies Bahrain, Sudan, Djibouti and the UAE also cut or downgraded their diplomatic relations while Kuwait has recalled its ambassador to Iran.
Another Iran-linked terror cell planning to carry out attacks in Bahrain was told to be found by officials last week.