A woman has been arrested in connection with alleged threats against Labour MP Naz Shah.
West Yorkshire Police said a 32-year-old woman was arrested on Tuesday evening.
A statement from the force said: "West Yorkshire Police can confirm a 32-year-old woman has been arrested in connection to alleged threats made against MP Naz Shah."
A spokesman added that the woman was in custody.
Earlier this week Bradford West MP Ms Shah announced she was looking into the death of one of her constituents amid claims she may have been the victim of a so-called honour killing.
Samia Shahid, 28, from Bradford, died last week while visiting relatives in northern Punjab and West Yorkshire Police said it was working with the "relevant authorities" to establish the cause of death.
Ms Shah was suspended from the Labour Party in April over anti-Semitic posts on social media, but was readmitted in early July.