Tesla's sales of its China-made electric vehicles edged up 0.8% in June from a year earlier, snapping an eight-month losing streak, but they continued to fall on a quarterly basis in the face of lower-cost new models from its Chinese rivals.

Elon Musk's Tesla has reported a 14% decline in vehicle deliveries in the second quarter of the year, as the electric car-maker's problems show no sign of abating. The just over 384,000 vehicles it delivered between April and June represents the second quarterly drop in a row.