Tesla Motors, maker of the battery powered Roadster sports car, lost three employees in a plane crash which happened over California’s Silicon Valley. The twin-engine Cessna 310 crashed shortly after taking off in fog from Palo Alto Airport. No injuries were reported on ground, but the accident cut off power supply to companies such as Hewlett-Packard and Facebook.

“We are withholding their identities as we work with the relevant authorities to notify the families. Our thoughts and prayers are with them. Tesla is a small, tightly-knit company, and this is a tragic day for us,” said Tesla’s CEO Elon Musk.

Police said that the plane struck a power tower and one of its wings came off, hitting a residential structure. Electricity was cut across the town, affecting about 28,000 people and forcing two hospitals to rely on emergency systems.

This unfortunate incident aside, things are looking up for the company. Palo Alto will be the future base for Tesla Motors, which is set for an initial public offering and the announcement of the location of its US assembly site. The 500-staff outfit has delivered about 1,000 of its $109,000 Roadsters (0-96 km/h in 3.7 seconds, 200 km/h limited top speed) to buyers, which includes celebrities like George Clooney.