DOUALA, June 1 (Reuters) - Cameroon's state oil refinery declared force majeure on Saturday, after a storage tank exploded overnight, causing a fire that shut down output at its main refinery in Limbe but caused no deaths.

(Reuters) - Athletics South Africa (ASA) said on Friday it had joined Caster Semenya's appeal against the ruling that currently prevents the double Olympic champion from running her preferred distance races unless she takes testosterone-suppressant medication.