Koba Resources (ASX:KOB) has resumed drilling at its Yarramba uranium project in South Australia following a temporary halt due to mechanical issues with the rig, according to a Tuesday filing with the Australian bourse.

The program is now focused on the Oban deposit, where another 70 holes are targeted to expand the current resource base, the filing said.

The uranium explorer's shares rose 4% in recent trade.

Price (AUD): $0.10, Change: $+0.0040, Percent Change: +4.21%