Britain and France are expected to argue that current sanctions are not working and call for the embargo to be altered at a meeting with European Union foreign ministers in Brussels.
Mr Hague's calls look set to be rejected with several EU countries - including the Netherlands, Sweden and the Czech Republic - opposed to the plans over fears the weapons could fall into the hands of Islamic extremist groups.
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Prime Minister Abiy Ahmed called the blast a ‘well-orchestrated attack’.
An explosion at a rally he was speaking at was the narrowest of escapes for Zimbabwean President Emmerson Mnangagwa.
President Emmerson Mnangagwa said ‘it is not my time’ after the blast at a Zanu PF event in Bulawayo.