* Crisis may distract from battle against militants * Mohamud and another opposition politician say homes targeted (Adds minister) By Abdi Sheikh MOGADISHU, April 25 (Reuters) - A former Somali leader accused his successor President Mohamed Abdullahi Mohamed of orchestrating an attack by soldiers on his home on Sunday as splits deepened over an extension of the incumbent's term in office. Former Somali president Hassan Sheikh Mohamud's accusation against Mohamed on Twitter - which did not include details or proof - came as factions within Somalia's security forces exchanged gunfire in the cap...