A massive fire tore through a historic post office building in the Philippines capital, Manila, overnight. Firefighters said the blaze started in the basement of the 100-year-old building and spread quickly due to confined spaces. Police said several people, mainly firefighters, were injured in the fire, which was brought under control in the morning. Firefighters said the blaze caused an estimated 300m pesos (£4.25m) worth of damage to the building. Manila's Central Post Office is considered one of the capital's busiest office buildings and is located on an intersection of key roads. The building was closed when the fire began. An investigation is under way to establish the cause of the blaze