Rescuers have so far managed to save 14 climbers
At least 10 climbers in Iran have died in mountains north of Tehran in an avalanche and blizzards, officials say.
The Alborz mountain range that towers over the capital city is popular with climbers and skiers but the past few days have seen treacherous weather.
The Red Crescent has deployed 20 teams who have rescued 14 climbers - but at least seven others are missing.
The search operation had to be halted at nightfall, and is now expected to resume on Sunday morning.
Among those who died are a political activist, an academic, a doctor and a mountaineering instructor.
At one point on Friday, about 100 people were stranded high up at a ski resort when the cable car broke down.
There had been earlier warnings of bad weather and possible avalanches.
On social media, some people reported malfunctions to GPS systems, which climbers rely on in the mountains. But it is unclear if those caught up in the blizzards and avalanche were affected.
The Alborz mountain range stretches from the border of Azerbaijan along the coast of the Caspian Sea
官員說，伊朗至少有10名登山者在德黑蘭以北的雪崩和暴風雪中喪生。
聳立在首都上空的阿爾伯茲山脈受到登山者和滑雪者的歡迎，但過去幾天天氣惡劣。
紅新月會已部署了20個團隊，救出了14個登山者-但至少有7個失蹤。
搜索操作必須在傍晚時分停止，現在預計將在周日上午恢復。
死者中有政治活動家，學者，醫生和登山教練。
周五某個時候，纜車發生故障，約有100人被困在一個滑雪勝地。
此前曾有惡劣天氣和雪崩的預警。
在社交媒體上，有些人向GPS系統報告了故障，登山者在山上依靠它。但目前尚不清楚那些捲入暴風雪和雪崩的人是否受到影響。
Updated from: BBC News