<div><span style="font-size: 1rem;">A bomb blast Friday at one of the biggest mosques in western Afghanistan killed 18 people including its influential imam, an official said, AFP reported.</span><br></div><div><br></div><div>"Eighteen people were martyred in the incident and 23 others were wounded," Hameedullah Motawakel, spokesman for the governor of Herat province, told reporters in a text message. - AFP&nbsp;</div><div><br></div><div>bnbd24/fas</div>