TWENTY people were killed and nearly 2,000 inmates escaped during an attack on a military barracks, a prison and other locations in Sierra Leone, officials said. The West African country was thrown into panic in the early hours when the assailants sent gunfire ringing across the capital Freetown. The government blamed "renegade soldiers" that it said had been repelled. President Julius Maada Bio said in an address on Sunday that most of the leaders of the attack had been arrested and that efforts to apprehend others were underway. An investigation has been launched, he said. Army spokesman Colonel Issa Bangura…