Members of the anti-terrorism squad are seen surrounding the compound where al Qaeda leader Osama bin Laden was killed in Abbottabad May 4, 2011. [Photo/Agencies]

ABBOTTABAD, Pakistan - The Pakistani who owned the compound that was Osama bin Laden's final hideaway meticulously bought up adjoining plots of land over two years and once cryptically told a seller that the property he bought for "an uncle" had become very valuable.

The new information that emerged Wednesday provided a new glimpse of one of two key figures who sheltered bin Laden in his last years and whose identities remain one of the biggest mysteries surrounding the al-Qaida chief.

Related readings:  Bin Laden again unites, then divides, US and Europe  NDP leader doubts US claims of bin Laden pics

At the same time, Pakistan stepped up its attempt to convince the world that it didn't know where bin Laden was located. They maintain that the al-Qaida leader's ability to hide in Abbottabad, an army town just two hours drive from the capital, was the result of an oversight by the government, not double dealing.

Pakistani Prime Minister Yousuf Raza Gilani said Wednesday that anyone who claimed his country hid bin Laden was "color blind."

During a visit to Paris, Gilani said that Pakistan shared intelligence with numerous countries in the fight against terrorism and had "excellent cooperation" with the United States. He said that "if we have failed, it means everybody failed," and an investigation would be ordered.

Property records obtained by The Associated Press on Wednesday show that a man named Mohammed Arshad bought the land in Abbottabad where bin Laden's compound was built. He bought the adjoining plots in four stages between 2004 and 2005 and paid $48,000.

Qazi Mahfooz Ul Haq, a doctor, told the AP that he sold a plot of land to Arshad in 2005. He said the buyer was a sturdily built man who had a tuft of hair under his lower lip. He spoke with an accent that sounded like it was from Waziristan, a tribal region close to Afghanistan that is home to many al-Qaida operatives.

"He was a very simple, modest, humble type of man" who was "very interested" in buying the land for "an uncle," the doctor said.

The doctor saw Arshad a few times after he sold him the land, he said. On one of those occasions, Arshad cryptically said, "your land is now very costly" - meaning valuable.

Arshad bought two other plots used for the compound in a less transparent transaction in November 2004, according to a review of the property records.

Raja Imtiaz Ahmed, who previously owned the two plots, said he sold them to a middleman who may have then passed them on to Arshad. He could not recall the middleman's name and was looking for records that would reveal it.

Neighbors of the bin Laden compound said one of the two Pakistani men living in the house who periodically ventured outside went by the name Arshad Khan, and roughly matched the physical description of Mohammed Arshad.