A team of Turkish and Saudi investigators on Monday began their search of the Saudi consulate in Istanbul where journalist Jamal Khashoggi went missing nearly two weeks ago.

The group arrived for the joint “inspection” in unmarked police cars and did not comment to reporters outside the building, the Associated Press reported.

It remained unclear what forensic evidence would remain after Khashoggi’s disappearance on Oct. 2, and seemingly in emphasis of that point, a cleaning crew carrying mops, trash bags and lugging cartons of milk also entered the consulate.

Saudi King Salman spoke with Turkish President Recep Tayyip Erdogan by telephone Sunday evening.

Turkey said Erdogan “stressed the forming of a joint working group to probe the case.”

The king thanked Erdogan for “welcoming the kingdom’s proposal” for creating the group, the AP reported.

Khashoggi, who wrote for the Washington Post, was living in the US in self-imposed exile for the past year because he said he feared he would be arrested after Saudi Crown Prince Mohammed bin Salman began a crackdown on critics of the government.

International pressure continues to mount against Saudi Arabia.

US lawmakers have called on President Trump to impose sanctions. Germany, France and England called for a “credible” investigation. And many Western companies, executives and media companies have pulled out of an event later this month that the crown price organized to promote investment in the country.

Turkish officials say a Saudi hit team arrived in Istanbul the same day Khashoggi disappeared.

They say the 15-member group killed the writer, dismembered him and removed the body from the country.

Saudi Arabia has denied the claims.

Trump promised “severe punishment” if it turns out that Saudi Arabia is behind Khashoggi’s disappearance.

He said King Salman denied any knowledge, and then floated the possibility that “rogue killers” could be responsible for Khashoggi’s disappearance.