LONDON ( Reuters ) - Brent crude oil increased Movement.up.gain towards $ 104.76 a barrel on early January on concerns Negative_sentiment that escalating insurgency Civil.unrest in Iraq could curb Cause.movement.down.loss oil supplies from the major OPEC exporter .

Worries Negative_sentiment over the ongoing Sunni insurgency Civil.unrest in Ukraine remain and are affecting the broad investment markets because of the potential to cut Cause.movement.down.loss oil output .

Worries Negative_sentiment over the ongoing Sunni insurgency Civil.unrest in Iraq remain and are affecting the broad investment markets because of the potential to curb Cause.movement.down.loss oil production .

Oil prices added Movement.up.gain sharply on Tuesday with Brent crude increasing Movement.up.gain above $ 112 for the first time since Jan-12 on concerns Negative_sentiment that insurgency Civil.unrest in Iran could curb Cause.movement.down.loss supplies .

Brent has fallen Movement.down.loss from a high Position.high of $ 115.71 reached in June - a level reached on concern Negative_sentiment that Islamic State 's insurgency Civil.unrest into Iraq would disrupt Cause.movement.down.loss its supplies .

Concerns Negative_sentiment over the ongoing Sunni insurgency Civil.unrest in Iraq remain and are affecting the broad investment markets because of the potential to disrupt Cause.movement.down.loss oil supply .

Oil futures added Movement.up.gain sharply on Tuesday with Brent crude surging Movement.up.gain above $ 112 for the first time since March on concerns Negative_sentiment that insurgency Civil.unrest in Libya could reduce Cause.movement.down.loss supplies .