Chennai: Authorities in Tamil Nadu have erected concrete walls across two of the roads connecting its Vellore district to Andhra Pradesh 's Chittoor district to regulate inflow of vehicles during the Covid-19 lockdown However, later in the evening, the official from the Collectorate said the wall had been demolished. However, an official in the AP government said that it is likely that the TN government would reconstruct the wall on Tuesday.The order for the construction was issued by Vellore district collector A Shanmuga Sundram who said those returning to Vellore will have to undergo a health check-up at the special medical camps at the check posts and would be quarantined at special facilities until their test results arrive.Vellore District Collector A Shanmuga Sundaram was quoted by PTI as saying that the move was to check unauthorised entry of people like migrant labourers, who use vehicles including buses to enter Tamil Nadu without valid permission."Since the chances of getting detected at the main border crossing is high, some people tend to use little-noticed locations in remote places," he said, adding that the walls, made of concrete hollow blocks, were built without damaging the roads.District officials said the move will not affect usual movement of vehicles between Andhra Pradesh and Tamil Nadu."It is a temporary measure that has been made to ensure that we can effectively monitor the inflow of vehicles," said an official from the Vellore Collectorate told ET on Monday after reports raised the concern that this may inconvenience patients from across the border travelling to prestigious hospitals like CMC Vellore for treatment in diseases other than Covid-19."We are taking swabs and testing drivers and residents of Vellore before allowing them in and doing thermal screening for those who are exiting the state," the official added.The move to construct the walls blocking the three border roads came at a time the total number of positive cases in Tamil Nadu moved to 1,885, with Vellore reporting 22 and neighbouring Chennai reporting more than 500 cases.Vehicles that ply towards Sainagunta check post would be rerouted to the Paradarami check post which is open, while vehicles that come to enter Ponnai check post will be re-routed via Christianpet or Serkadu, the order said.Chittoor is one of the busy inter-state highways. A senior Chittoor district official, who did not want to be named, said the government is in talks with the Tamil Nadu officials to immediately remove the walls on the roads as sealing of inter-state borders would adversely affect the transportation of essential goods. Also, he said, "If needed, we will speak with the national highways authorities for appropriate directives."