Five killed in cafe explosion in Ethiopia.

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1Five killed in cafe explosion in Ethiopia .
2At leave five people were killed and 20 others injured on Saturday in a cafe explosion in Ethiopia 's northern region of Tigray .
3Tigray 's administrator Micheal Abraha said the explosion was carried out by neighboring Eritrea with an aim to jeopardize Ethiopia 's national elections on May 23 .
4President of the Tigray Regional State , Tsegay Berhe , also said Eritrean agents were responsible for the attack .
5`` Ethiopian elections wo n't be disrupted despite Eritrea 's attempts to do so , '' he said .
6There was no immediate comment from the Eritrean government .
7Relations between Eritrea and Ethiopia had long been strained since Eritrea formally gained its independence from Ethiopia in 1993 after a 30-year war .
8Tensions between the two countries escalated after Ethiopia and Eritrea fought a brutal border war from 1998 to 2000 .