Iranian supreme leader Ayatollah Ali Khamenei at a meeting with Iranian elite students in Tehran, Iran, today. Photograph: Iran supreme leader website/EPA

Iran’s supreme leader has described Donald Trump as “mentally retarded” as he urged Europe to do more to back the 2015 nuclear deal, following the US (...)

Providence Resources has put out a request for pricing on a rig for its prospect at Barryroe, off the coast of Cork. Photograph: Finbarr O’Rourke

Shares in Providence Resources took a kicking on Monday after the Irish explorer run by Tony O’Reilly jnr revealed its Drombeg prospect off the southw(...)

In the US, uncertainty about the impact of tropical storm Harvey pushed investors toward safe-haven assets. Photographer: Michael Nagle/Bloomberg

Sterling-sensitive stocks such as C&C, Total Produce and Bank of Ireland were out of sorts on Monday in Dublin as the UK currency continued its lo(...)

The new crude pipeline will connect Uganda’s Hoima oilfields in the west to the port of Tanga in neighbouring Tanzania.  Photograph: iStock

Standard Bank Group’s Ugandan unit plans to raise $3 billion (€2.56bn) for a crude pipeline by the second half of next year as the east African countr(...)

The award comes days after Providence agreed a €19 million deal with a subsidiary of French giant Total. Photograph: iStock

Oil and gas explorer Providence has awarded share options worth almost €640,000 to its chairman Pat Plunkett and four non-executive directors. The ne(...)

 British oil giant BP rebounded back into net profit in the first quarter, energised by deep cost-cutting and rising crude prices, the group announced on May 2, 2017.  Photograph: Getty Images

BP’s profit nearly tripled in the first quarter of 2017 from a year earlier thanks to higher oil prices and production, and as its sharp cost cutting (...)

Aidan Heavey: Mr Heavey (64) will continue to receive his chief executive remuneration and benefits for six months after stepping down

Tullow Oil’s outgoing chief executive, Aidan Heavey, has said he was “confident” the exploration group had the ability to prosper as he handed over t(...)

An oil drilling block managed by Tullow Oil in Kenya where it says  it continues to make good progress. Photograph: AFP

Investment banks and securities firms underwriting a $750 million (€706 million) Tullow Oil share sale are on track to avoid being left holding large (...)

Founding chief executive  Aidan Heavey will hand over to chief operating officer, Paul McDade.

Tullow Oil received backing from its shareholders at a meeting in London on Wednesday to complete a £607 million (€710 million) share sale to bolster (...)

Aidan Heavey will remain chairman of Tullow Oil for up to two years. Photograph: Nick Bradshaw

Tullow Oil has unveiled plans to raise £607 million (€695 million) through a share sale offered to existing shareholders at a deeply discounted price (...)