Last month, the obscure Sindhudesh Revolutionary Army (SRA) claimed a pair of attacks against Chinese businessmen going about their affairs in the Pakistani port city of Karachi. A bomb was detonated near a restaurateur, while a businessman and his interpreter were shot at as they looked around a car showroom.

The random attacks were not surprising, with the group being one of a number that have targeted the growing Chinese population in Pakistan, but the decision to attack so brazenly in Pakistan's largest city showed the group's growing ambition.