- Police are urging witnesses who may have seen a black car speeding off to come forward
- The incident happened in Alderney Gardens at 9pm on August 24
- Witnesses should call Basildon police station on 101 or Crimestoppers on 0800 555 11
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The 47-year-old man died shortly after 3pm on Tuesday.
Specialist explosive detection dogs searched through the town examining letter boxes and phone booths for signs of potential devices.
Temperatures reached 29.1C in St James's Park, central London.