Beijing ? China on Tuesday denied a report that its military had hacked into Pentagon computers, saying the allegations were “groundless” and that Beijing was opposed to cybercrime.

The Financial Times, citing unnamed officials, reported Monday that the People’s Liberation Army hacked into a computer system in the office of Defense Secretary Robert Gates in June. The attack forced officials to take down the network for more than a week, the report said.

“Some people make groundless accusations against China” that its military attacked the Pentagon, Chinese Foreign Ministry spokeswoman Jiang Yu said at a regular news briefing.

“China has all along been opposed to and forbids criminal activities undermining computer networks, including hacking,” she said. “China is ready to strengthen cooperation with other countries, including the U.S., in countering Internet crimes.”

The Financial Times report said the Pentagon was still investigating how much information was stolen, but cited an unnamed person as saying that most of it was probably unclassified.