Most stock markets in the Gulf ended lower on Sunday as U.S. President Donald Trump's comments accusing China of breaking a bilateral trade deal added to uncertainty over tariffs.

Trump has also announced plans to double worldwide steel and aluminium tariffs to 50%. Later said he would speak to his Chinese counterpart to "hopefully" work out differences.

A federal appeals court last week temporarily reinstated the most sweeping of Trump's tariffs, a day after a U.S. trade court ruled that Trump had exceeded his authority in imposing the duties and ordered an immediate block on them.

Saudi Arabia's benchmark index dropped 1.5%, weighed down by a 2.2% slide in Al Rajhi Bank  and a 0.9% decrease in Saudi National Bank.

Elsewhere, oil company Saudi Aramco  eased 0.7%.

Aramco has published a new prospectus for its issuance programme of Islamic bonds or sukuk, signalling the state oil group may soon tap the debt markets again after it raised $5 billion from a three-part bond sale this week.

In Qatar, the index gained 0.4%, ending a five-session losing streak, helped by a 1.1% rise in the Gulf's biggest lender Qatar National Bank.

Outside the Gulf, Egypt's blue-chip index dropped 0.6%, hit by a 2.7% retreat in Commercial International Bank.

SAUDI ARABIA

 fell 1.5% to 10,825

QATAR

added 0.4% to 10,501

EGYPT

down 0.6% to 32,500

BAHRAIN

eased 0.1% to 1,919

OMAN

added 0.1% to 4,565

KUWAIT

gained 0.4% to 8,832

(Reporting by Ateeq Shariff in Bengaluru. Editing by Jane Merriman)