NEW YORK (AP) — Shares of Tesla Motors jumped almost 4 percent Thursday after the electric car maker’s CEO hinted at introducing new technology next week.

Elon Musk took to Twitter late Wednesday with a message that said: “About time to unveil the D and something else.” Also included was a photograph of the front of a vehicle peeking out from under a partially opened garage with a large letter “D” on the front of it. The photo also has the date Oct. 9.