By Reuters Staff 4 Min Read (Reuters) -Myanmar army artillery shelled positions held by civilian militias in a northwestern town for a second day on Friday, rebel fighters and a lawmaker said, after the ruling junta declared martial law there to quell a local rebellion against its rule. The junta said martial law was imposed in Mindat in Chin State late on Thursday after whom it called “armed terrorists” attacked a police station and a bank. The attacks posed a further challenge to the military as it struggles to restore order in the country amid widespread anger over its coup in February which ousted the elected civilian government of Aung San Suu Kyi.