A magnet fisherman made a dramatic discovery while fishing in the River Aire.
Dave Pearce, of Roundhay, while magnet fishing near Crown Point.
Puzzled by what it was, Dave took a picture of the find and shared it on Facebook before someone told him it looked like an unexploded mortar.
He then called police who told him to 'put it down, don't touch it'.
Crown Point Bridge is now closed and cordoned off by police while a bomb squad is on its way. This is causing long delays to traffic in the area.
Dave, from Roundhay, told LeedsLive: "I were magnet fishing, I pulled it out and the unexploded mortar bomb was attached to it.
'I didn't realise what it were at first'
"I took photos, posted them on Facebook and asked if anyone knew what it were.
"They said its an 18lb unexploded mortar, so we called the police."
A brass cup with what appear to be swastikas on it was found in the same spot on the river.
In a statement West Yorkshire police said:
"At 11:14am today, police received a report of a suspected first or second world war mortar device at Crown Point Road, Leeds.
"A cordon has been put in place while the package is due to be examined. EOD are on the way and Crown Point Road is currently closed."
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