New Delhi, March 16: There has been a surge in cyber attacks on the US engineering and maritime industries — especially those connected to the South Chi Sea — and a Chinese cyber espioge group TEMP.Periscope is behind this, US-based cybersecurity firm FireEye said on Friday. Since early 2018, FireEye has observed an ongoing wave of intrusions, suspected to be from TEMP.Periscope, targeting engineering and maritime entities, especially those connected to South Chi Sea issues.