A father who lives next door to a house where a group of men were arrested on child sex charges fears they will return.

Nine men were held on suspicion of what police have described as 'conspiracy of sexual activity with a child' and remained in custody on Saturday morning.

They were dragged out of homes on Loudon Street and Walbrook Road in Normanton and Pear Tree, Derby, at about 10pm on Friday and Saturday morning.

Police forensic officers search a house in Derby where some of nine men were arrested on child sex charges

The men lived in this rented modest three-bedroom red brick terraced house with a popular park with a children's play area at the end of the road

The neighbour of the house on Loudon Street spoke out as police knocked on doors and forensic experts continued a painstaking search of the property.

'It is a huge shock and I hope they don't come back here,' he told MailOnline.

'It's bad enough having your neighbours arrested then to find out what it's for makes it so much worse. My wife and I feel sickened.'

The householder, who has a 14-year-old son and daughter of 22, said he heard 'a huge bang' at about 10pm.

'It sounded as if the door was being knocked through. 'I didn't witness the arrests but noticed something was wrong when I saw the police presence this morning,' he said.

'Forensic teams have been searching the place all day and have sealed off the front door. There's still a police van parked outside.'

The men lived in a rented modest three-bedroom red brick terraced house with a popular park with a children's play area at the end of the road.

'There are four or five black men living there aged 20-40. I only know them to say hello to if I'm out cleaning my car in the street,' the neighbour said.

'I've just come back from a holiday to Dubai so haven't seen them for a few weeks. It's a very multicultural street with bog standard terraces and lots of families. Some of the adults here don't even speak English.'

As forensic experts took possible evidence away from the house in the busy street, two young female officers from Derby Police were conducting door to door inquiries

He said he had never seen 'anything untoward' happening at the house or children visiting but had seen 'a few people coming and going.'

'Everyone here is busy doing their own thing. But this is a huge shock for us, we never suspected it. My only hope is that they don't come back here whether they're charged or not,' he said.

Another neighbour said there was a lot of noise after new tenants moved into the rented house a month ago.

'There's been loud music. There always seems to be different people about. I saw loads of men coming and going at all times,' she told the Daily Telegraph.

'It was about 11pm when I was aware the police were here. There were quite a few of them and it was clear something serious was happening.

'I'm a mother to two children so it's really shocked me. But I feel reassured that the police are here. That does make me feel better.'

As forensic experts took possible evidence away from the house in the busy street, two young female officers from Derby Police were conducting door to door inquiries.

'We need to see if anyone has seen or heard anything, and we want to give some assurance to residents who may feel worried,' one officer said.

Many of the houses in the street appear run down on the outside.

'We need to see if anyone has seen or heard anything, and we want to give some assurance to residents who may feel worried,' one officer said

A social club is at one end and just 300 metres away from the house being searched lies Arboretum Park, Britain's first ever public park which was opened in 1840 as a botanical tree garden.

Other police went door-to-dooror searches at a second house less than a mile away on Walbrook Road in Pear Tree.

An officer stood guard outside the terraced home where more alleged child sex criminals were arrested, while forensics experts scoured inside.

'Police kicked the front door down last night and made several arrests. I heard a commotion and when I looked out I saw officers going in,' a neighbour said.

'It was very dramatic. Minutes later they brought two or three residents out in handcuffs and bundled them into van. They went without struggling.

'It's all very shocking because this road's not really bad and is quiet.'

'It's bad enough having your neighbours arrested then to find out what it's for makes it so much worse. My wife and I feel sickened,' a neighbour said

The man said it was a rental house inhabited by men from Somalia who looked like they were aged in their 20s, who were frequently coming and going.

'They never caused any trouble and I was surprised to hear what's been going on. It's awful, there's lots of families living here and we're all worried to hear about this possibly happening on our doorsteps.'

Superintendent Tracy Harrison said the force would increase the number of officers on patrol in the area over the coming days.

'Our officers will be out in the community to offer reassurance to people living in the area,' she said.

'I would encourage anyone who has any concerns or wants to talk about issues in their neighbourhood to go up and have a chat with the officers.'