LONDON, Aug. 4 (Xinhuanet) -- Thursday has become the day of terror for London as armed officers patrol London's streets and transport system -- two weeks after the failed July 21 bombings and four weeks after the July 7 attacks that killed 56 people.

    More than 6,000 officers, many armed, are patrolling underground stations and key sites in the city, as the Piccadilly Line, the worst-hit underground railway line in the July 7 bombingattack, has reopened.

    Meanwhile, the first person charged in connection with the attacks is due to appear in court.

    Metropolitan Police Assistant Commissioner Tarique Ghaffur said work on major murder investigations had "slowed to a trickle", because so many specialist detectives had been moved to tackle terrorism, according to BBC News Thursday.

    Extra officers have been brought in from outside the capital and retired officers are also persuaded to return to help with the anti-terror work, he said.

    "Any help we are able to call upon we will call upon. But the longer-term implication, even of bringing in retired officers, has to be considered because it has budgetary implications," Tarique said.

    Ismael Abdurahman, 23, will appear before Bow Street Magistrates' Court charged under the Terrorism Act in relation to the failed bomb attacks in London on July 21.

    Arrested on July 28, he is accused of withholding information that may have helped catch a person involved in terrorism.

    There are a further 14 people being held in connection with the attacks. Enditem