The EU failed on Sunday to agree on an embargo of Russian oil, but diplomats but will still try to make progress ahead of a Monday-Tuesday summit on an exemption for pipeline deliveries to landlocked Central European countries, officials said.

However, a senior EU diplomat said there was "still too much detail to sort out" to hope for an agreement before European Union leaders gather in Brussels on Monday afternoon.

The proposed sanctions on oil imports is part of the European Union's sixth sanctions package on Russia over its invasion of Ukraine.

(With input from Reuters)