Lewis Hamilton has taken the lead in the Formula 1 championship after winning the Azerbaijan Grand Prix in a chaotic finish to a race that saw both Red Bulls collide with each other.

Hamilton's teammate Valtteri Bottas was on course to win in Baku after Mercedes took advantage of a late safety car to move ahead of Sebastian Vettel's Ferrari.

However, Bottas suffered a puncture while Vettel lost three places at the restart after locking up trying to overtake for the lead, setting Hamilton up for a straightforward victory.

The race had resumed with five laps remaining after Max Verstappen and Daniel Ricciardo collided following a race-long battle in which the teammates had already twice made contact.

Kimi Raikkonen of Ferrari finished second ahead of Force India's Sergio Perez, while Hamilton has a first win since last October's US Grand Prix and now boasts a four-point championship lead over Vettel.

Azerbaijan GP rankings in full:

1. Lewis Hamilton (Mercedes)
2. Kimi Raikkonen (Ferrari)
3. Sergio Perez (Force India)
4. Sebastian Vettel (Ferrari)
5. Carlos Sainz Jr (Renault)
6. Charles Leclerq (Sauber)
7. Fernando Alonso (McLaren)
8. Lance Stroll (Williams)
9. Stoffel Vandoorne (McLaren)
10. Brendon Hartley (Toro Rosso)
11. Marcus Ericsson (Sauber)
12. Pierre Gasly (Toro Rosso)
13. Kevin Magnussen (Haas)
R. Valtteri Bottas Mercedes)
R. Romain Grosjean (Haas)
R. Max Verstappen (Red Bull)
R. Daniel Ricciardo (Red Bull)
R. Nico Hulkenberg (Renault)
R. Esteban Ocon (Force India)
R. Sergey Sirotkin (Williams)