The Republican-led US House of Representatives approved a resolution on Wednesday to block President Donald Trump from continuing the war against Iran, reflecting growing concern among members of his party about the three-month-old conflict.

The House voted 215 to 208, as four Republicans voted with Democrats in favor of the war powers resolution, which directs Trump to withdraw US troops from Iran unless Congress declares war or authorises the use of military force.

The move marked the first time the Republican-controlled House had approved a measure seeking to force Trump to wind down military operations against Tehran since the war began three months ago.

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